Jawan killed as Maoists blast vehicle in Gadchiroli

first_imgOne commando was killed and 18 others were injured when an IED exploded in the Gadchiroli district of Maharashtra on Wednesday night. The commandos were part of Maharashtra’s elite anti-Naxal Unit C-60. Maoists blew up the commandos’ anti-land mine vehicle with the IED, Inspector-General Shivaji Bodkhe of Maharashtra confirmed.Five of the injured have been airlifted to Nagpur and seven more are on their way. One jawan is said to be in critical condition.last_img

Origins of social media fiasco surrounding Ohio State football team unknown

Members of the Ohio State football team began their first day under new coach Urban Meyer Tuesday in a cloud of social media confusion, and it still hasn’t been sorted out. After a 7 a.m. Tuesday meeting with Meyer, several OSU football players tweeted that they were told they were banned from Twitter, a social media platform. Players backtracked and said there was no ban just hours later, but the origin of the supposed ban remains unclear. Junior tight end Reid Fragel tweeted from his account, @FRAGEL88, around noon Tuesday, saying: “New staff new rules. No more twitter, not a big deal and probably for the better. Love our fans, love this place. Go Bucks #2012.” By about 4:45 p.m., Fragel issued the following tweet: “Just now finding out the whole twitter thing wasn’t exactly true. #hearsay.” OSU athletics representative Jerry Emig, who was present at the football team’s Tuesday meeting, told The Lantern that Meyer never informed him of a Twitter ban for the players. “All I know was I was not made aware of a ban,” Emig told The Lantern in a Wednesday email. “I have no idea where this all originated or how it originated.” David A. Goldberger, professor emeritus of law at OSU’s Moritz College of Law, said Tuesday that a complete ban of Twitter, or another social media platform, would be unlawful. “I have my doubt about this, but there may be topics that the coach can put out of bounds, but to say that you can’t use a social media is far too broad,” Goldberger said. “It’s like saying you can’t talk.” From his Twitter account, @king_hyde34, OSU sophomore running back Carlos Hyde said Tuesday: “Well guess its been real twitter ima miss all my followers.” Later that day, Hyde tweeted: “Coach didn’t tell us this morning that twitter is banned guess the media likes to make up things. #GoBucks!” In an Oct. 26 email to The Lantern, OSU athletics spokesman Dan Wallenberg said not every OSU team institutes formal policies on social media use. “Each (OSU) team, if it has a policy, handles on its own,” Wallenberg said. Wallenberg also confirmed that the OSU men’s basketball team, currently the No. 6-ranked team in the Associated Press Top 25 poll, does not have a formal policy. Players, including junior tight end Jake Stoneburner, wasted little time returning to their accounts. From his account, @STONEYeleven, Stoneburner said Wednesday at around 3 p.m.: “Can’t wait to get going in this new offense!” read more

Benitez not happy with the worsening performance

first_imgRafael Benitez admitted that he was very surprised and upset after his side’s performance in a shocking 1-0 loss to West Bromwich Albion and he didn’t see that coming after the last great performances.The Magpies managed to avoid the relegation by making an impressive run of great results but this game was not the best one for them as they were beaten by last-placed West Brom after a bad performance.The Spaniard spoke about his side’s effort as he said, according to Chronicle Live:“Everything we did in the last few games, we didn’t do.”Jose Mourinho is sold on Lampard succeeding at Chelsea Tomás Pavel Ibarra Meda – September 14, 2019 Jose Mourinho wanted to give his two cents on Frank Lampard’s odds as the new Chelsea FC manager, he thinks he will succeed.There really…“We wanted to get more points to finish higher in the table, but we didn’t do well today, we made a lot of mistakes, and we weren’t good enough.”“We didn’t think the job was done, but it’s a pity because we’ve had a good season, but we want to finish better, too.”“I congratulate the players for a good season, but we need to be better than today.”last_img read more

Salah posts injury update

first_imgMohamed Salah has taken to social media to update fans with some positive news on his injury ahead of the World CupThe 25-year-old was forced to leave the pitch within just half an hour of Liverpool’s Champions League final after his tangle with Ramos had caused a shoulder problem to arise with the Reds later struggling in his absence as Real Madrid sealed a 3-1 win.Since then, over half a million people have signed a petition urging the UEFA to punish Ramos over the incident.Salah is a potential doubt for Russia this summer with both Liverpool and Egypt confirming that his recovery from injury could make around three weeks.The Pharaohs’ first game against Uruguay on June 15 will mark their first appearance in football’s biggest stage in nearly three decades.Mohamed Salah, Sadio Mane, LiverpoolMo Salah laughs off Sadio Mane incident with a brilliant video Andrew Smyth – September 14, 2019 Mohamed Salah laughed off his little spat with Liverpool team-mate Sadio Mane by posting a brilliant video showing they’ve made up.But Salah is staying positive on his progress and appears to be confident that he will be available for Egypt’s World Cup opener.“Good feelings,” Salah wrote alongside a photograph of him carrying out a stretching exercise on his damaged left shoulder.Good feelings… pic.twitter.com/Jhyd2kYVKI— Mohamed Salah (@MoSalah) June 3, 2018last_img read more

Gareth Bale transfer talks intensify ahead of a potential deal

first_imgMoves by Manchester United boss Jose Mourinho to strengthen his attacking options has intensified as contacts between him and Madrid Gareth Bale for a switch has reached top gear.Cristiano Ronaldo is reportedly lower down the target list and could find himself out of the picture if his team-mate heads to Old Trafford, according to Daily Star. Bale hinted at a move away from Real Madrid after his match-winning display in the 3-1 Champions League win against Liverpool.Mourinho is on the hunt for a new winger and, according to Don Balon, believes Bale would suit his system.After the Champions League final, Bale sparked speculation when he said: “I feel like I deserved to start because I’ve been playing very well.Jose Mourinho is sold on Lampard succeeding at Chelsea Tomás Pavel Ibarra Meda – September 14, 2019 Jose Mourinho wanted to give his two cents on Frank Lampard’s odds as the new Chelsea FC manager, he thinks he will succeed.There really…“I’ve playing well since Christmas and any player would want to start.“For me personally, I feel I should be playing week in and week-out and I haven’t been.“I haven’t been playing as much as I would like and I’m going to have to sit down with everybody at a big table in the summer and seriously consider what move I’m going to make next.“I feel like there’s still a lot more to give for me and that’s why I need to be playing week-in and week-out, that’s what I need.”last_img read more

Thanks to Ronaldo Serie A matches will arrive to a TV

first_imgThe Italian football league has made a deal with a U.S. TV channel to broadcast its matches in AmericaCristiano Ronaldo’s signing with Juventus was not only good for the team.The Italian club has sold out on all CR7 shirts for the 2018-2019 season thanks to the Portuguese superstar.But now, his contract with the Bianconeri has proved to be useful for the Italian Serie A.On an article published by The World Soccer Talk, it was announced that ESPN will broadcast the Serie A matches in the U.S. in a multi-year deal.Franck Ribery, FiorentinaFiorentina owner: “Ribery played better than Ronaldo!” Andrew Smyth – September 14, 2019 Fiorentina owner Rocco Commisso was left gushing over Franck Ribery’s performance against Juventus, which he rates above that of even Cristiano Ronaldo’s.“We are extremely satisfied with the agreement, which testifies the growing importance and the international recognition of our league,” said Gaetano Miccichè, Serie A President.“This agreement, together with those recently concluded, shows the value of both Serie A TIM and its champions, which will be appreciated by more than 90 million soccer fans and enthusiasts in the U.S. in the next years.”ESPN cuts a deal for rights to Italy’s Serie A. The streaming service ESPN+ will carry 9 matches live per week from August through May; ESPN or ESPN3 will carry a Match of the Week.— John Ourand (@Ourand_SBJ) August 7, 2018last_img read more

Video Sergio Ramos Mohamed Salah meet again

first_imgSergio Ramos and Mohamed Salah met each other for the first time on Thursday night since May’s Champions League finalSalah was forced to leave the pitch in Kiev in tears back then after Ramos dragged him to the floor in the first half of the game.The Real Madrid captain caused damage to Salah’s shoulder ligaments and the Egyptian king was then forced to watch Liverpool lose 3-1 from the bench.The incident between Salah and Ramos caused a huge uproar with many fans setting up petitions demanding that FIFA and UEFA punish the latter for his challenge.As a result of the injury, Salah’s participation in Egypt’s first World Cup campaign in 28 years was limited to a restricted role with the national side exiting the tournament in the group stages without a single point.On Thursday evening, Ramos was named the 2017/18 Champions League defender of the season.Upon receiving the award, Ramos walked back to his seat and tapped the shoulder of Salah – who had been seated in front of the Spaniard.In the video below, Salah seems to refuse to acknowledge Ramos at all.Sergio Ramos, Real MadridZidane reveals Sergio Ramos injury concern for Real Madrid Andrew Smyth – September 14, 2019 Zinedine Zidane has put Sergio Ramos’ availability for Real Madrid’s trip to Sevilla next weekend in doubt after withdrawing him against Levante.“Remember me?” ? pic.twitter.com/U4ZVhZ7PAW— B/R Football (@brfootball) August 30, 2018Ramos made sure that Salah was not out of his sight throughout the entire evening.Ramos: “How’s the arm?”Salah: “I don’t want to talk about it…” pic.twitter.com/2hlb9JQ4fl— Dale O’Donnell (@ODonnellDale) August 30, 2018last_img read more

Louis Saha hopes Solskjaer influence Paul Pogba positively

first_imgFormer Newcastle forward Louis Saha hopes Solskjaer can be a positive influence on French international Paul Pogba.🔥🔥🔥🔥🔥@ManUtd #mufc pic.twitter.com/vEb5ErlNPG— Paul Pogba (@paulpogba) December 22, 2018Given Solskjaer’s selfless nature as a player and a coach, Saha confirms such humility will aid communication with Pogba.Harry Maguire, Manchester UnitedLiverpool legend Nicol slams Harry Maguire’s Man United form Andrew Smyth – September 14, 2019 Steve Nicol believes Harry Maguire has made some “horrendous mistakes” recently, and has failed to find his best form since joining Manchester United.“Ole has a lot of humility and it can help in their communication,” Saha said as quoted in FourFourTwo“He will put his ego aside as ‘boss’ and he’ll tell himself that today the team goes first.“It is what Ole does. He’s always done it. He made great sacrifices for his team-mates. He’s made the difference for his team-mates and his coach. That’s Ole. He will give that [to the team].“That’s a message he’ll give gradually to all the players. They need to get their confidence back. They almost need some paternal communication.“A misplaced pride in a great club constantly under the scrutiny of everyone. Whatever will happen, there they’ll talk about it because it’s one of the most followed clubs in the world. “last_img read more

Subscription Fatigue Nearly Half of US Consumers Frustrated by Streaming Explosion Study

first_imgStreaming entertainment is smacking into the wall of the paradox of choice — and the cost to consumers of piecing multiple services together.The boom in subscription streaming services has given consumers more options than ever, with an array that includes Netflix, Hulu, Amazon Prime Video, HBO, CBS All Access, Showtime and YouTube Premium. Even more are coming down the pike with Apple, Disney, WarnerMedia, NBCUniversal and others promising to enter the fray in a big way.But the plethora of options has a downside: Nearly half (47%) of U.S. consumers say they’re frustrated by the growing number of subscriptions and services required to watch what they want, according to the 13th edition of Deloitte’s annual Digital Media Trends survey. An even bigger pet peeve: 57% said they’re frustrated when content vanishes because rights to their favorite TV shows or movies have expired. Popular on Variety “Consumers want choice — but only up to a point,” said Kevin Westcott, Deloitte vice chairman and U.S. telecom and media and entertainment leader, who oversees the study. “We may be entering a time of ‘subscription fatigue.’”All told, there are more than 300 over-the-top video options in the U.S. With that fragmentation, there’s a clear opportunity for larger platforms to reaggregate these services in a way that can provide access across all sources and make recommendations based on all of someone’s interests, Westcott said. “Consumers are looking for less friction in the consumption process,” he said.Today, the average U.S. consumer subscribes to three video streaming services; 43% subscribe to both pay-TV and streaming services, per Deloitte’s study. Effectively, Westcott said, they’re cobbling together their own entertainment bundles from multiple providers.Again, the sprawl of content options presents headaches. Nearly half (49%) of consumers in Deloitte’s survey said the sheer amount of content available on subscription VOD makes it hard to choose what to watch. Meanwhile, consumers say they know exactly what they want to watch 69% of the time, but 48% say content is hard to find across multiple services. And 49% give up on searching for content if they can’t find it in a few minutes.Deloitte’s survey found strong growth in streaming video subscription services — with 69% of households now subscribing to one or more — and streaming music services (41%). Pay TV remained relatively flat with 65% of U.S. households subscribing to cable, satellite or telco TV.Other findings from Deloitte’s study:Originals drive subscriptions: High-quality original content continues to be a dominant factor in streaming video growth, with 57% of all current U.S. streaming consumers (and 71% of millennials, ages 22-35) saying they subscribe to streaming video services to access original content.TV ad loads: 75% of consumers say they would be more satisfied with pay-TV service if there were fewer ads, and 77% said ads on pay TV should be under 10 seconds. Respondents indicated 8 minutes of ads per hour of programming was the reasonable upper bound — while they also said that 16 minutes or more of commercials per hour is the point they would stop watching.Data privacy: Consumers are increasingly wary of how companies handle their data, with 82% saying they don’t believe companies do enough to protect their personal data. Just 7% of respondents believe the government should play a role in protecting their data.Voice assistants: Ownership of voice-enabled home speakers grew 140% year-over-year in 2018, with total penetration soaring from 15% to 36%. The top five uses of voice-enabled digital assistants are playing music, searching for information, getting directions, making phone calls and setting alerts. However, half of consumers said they don’t use voice-enabled digital assistants at all, and only 18% claimed to use if daily.Video games: 41% of U.S. consumers play games at least weekly; among Gen Z (14-21) consumers, 54% do. Gaming consoles are being used more often as an entertainment hub — to stream TV/movie content (46%), watch online content (42%), browse the internet (34%), stream music (25%), and stream eSports (11%).Esports: One-third of U.S. consumers watch esports at least once a week — and 54% of Gen Z respondents do.The U.S. data for the 13th edition of Deloitte’s Digital Media Trends survey was collected from an online survey of 2,003 consumers fielded from December 2018 to February 2019. Additional findings from the study are available at this link.center_img ×Actors Reveal Their Favorite Disney PrincessesSeveral actors, like Daisy Ridley, Awkwafina, Jeff Goldblum and Gina Rodriguez, reveal their favorite Disney princesses. Rapunzel, Mulan, Ariel,Tiana, Sleeping Beauty and Jasmine all got some love from the Disney stars.More VideosVolume 0%Press shift question mark to access a list of keyboard shortcutsKeyboard Shortcutsplay/pauseincrease volumedecrease volumeseek forwardsseek backwardstoggle captionstoggle fullscreenmute/unmuteseek to %SPACE↑↓→←cfm0-9Next UpJennifer Lopez Shares How She Became a Mogul04:350.5x1x1.25×1.5x2xLive00:0002:1502:15last_img read more

Enhanced strength and ductility in a highentropy alloy via ordered oxygen complexes

first_img Deformation mode. a) STEM image of the TiZrHfNb base HEA at 8% tensile strain (the yellow arrows indicate the coplanar dislocation arrays). b) STEM image of O-2 HEA at 8% tensile strain (the red arrows indicate the dipolar walls). c) STEM image of N-2 HEA at 8% tensile strain (the yellow arrows indicate the planar slip bands). Typical planar slip is observed in the base HEA and in the nitrogen-doped alloy variant N-2 HEA. However, wavy slip dominates deformation of the oxygen doped variant O-2 HEA, suggesting that oxygen addition leads to a plastic deformation mode dominated by wavy slip. The beam direction in a and c is [011] while that in b is [001]. d) Dislocation spacing of the TiZrHfNb base HEA and of the interstitially doped variants O-2 and N-2 HEAs probed during in situ TEM tensile experiments. The white arrows represent the dislocation spacing. The average dislocation spacing in the O-2 HEA is much smaller than that in the base HEA and in the N-2 HEA. The error bars are standard deviations of the mean. Credit: Nature, doi: 10.1038/s41586-018-0685-y Journal information: Nature To understand the underlying mechanism of this anomalous, interstitial solid-solution strengthening effect observed with oxygen doped materials, nanostructures of materials were investigated at the atomic scale. For this, the scientists first used synchrotron high-energy X-ray diffraction (XRD) patterns of the base HEA compared with the two alloy variants of O-2 and N-2 HEA. The results showed that addition of either nitrogen or oxygen to the base HEA did not change its single-phase body-centered cubic (b.c.c) structure. This observation was confirmed by electron back-scattering diffraction mapping. In the scanning transmission electron microscope high-angle annular dark field micrograph (STEM-HAADF) images of the O-2 HEA; light atoms were represented in dark contrast, while heavy atoms were imaged bright. Mechanical properties. a) Room-temperature tensile stress–strain curves for the as-cast TiZrHfNb (denoted as base alloy), (TiZrHfNb)98O2 (denoted as O-2) and (TiZrHfNb)98N2 (denoted as N-2) HEAs. σy is the yield strength (squares), σUTS is the ultimate strength (diamonds) and ε is the elongation (circles). The inset shows the corresponding strain hardening response (dσ/dε). A higher work-hardening rate is observed for the O-2 HEA variant (TiZrHfNb)98O2 compared to the base HEA TiZrHfNb and the N-2 HEA (TiZrHfNb)98N2. b) Changes in strength and ductility observed for the HEAs introduced here, relative to several types of established high-performance alloys. The reference systems are Ti6Al4V, β-Ti alloys, niobium, vanadium, interstitial free steel and 316 austenitic stainless steels. The alloys’ interstitial oxygen or nitrogen content is indicated for comparison. Credit: Nature, doi: https://doi.org/10.1038/s41586-018-0685-y Schematic diagram illustrating the mechanism of plastic deformation in the cubic structure of the oxygen-rich high-entropy alloy (HEA). a) In the oxygen-high entropy alloys, the ordered oxygen complexes (OOCs) acted on dislocations in mechanical strain studies. b) During the initial stages of plastic deformation, the planar slip still prevailed. c) Once the dislocations encountered severely distorted interstitial-enriched OOCs, cross-slip is promoted due to their strong pinning effects. d) This results in massive dislocation multiplications. e) More and more dislocations are pinned by OOCs, and dipolar walls emerged as the strain increased to promote work hardening of the material, eventually leading to higher ductility. Credit: Nature, doi: https://doi.org/10.1038/s41586-018-0685-y Researchers present new strategy for extending ductility in a single-phase alloy Engineering strong, tough (damage-tolerant) materials traditionally requires striking a compromise between hardness and ductility. In the new study, oxygen complexes were structurally ordered in nanoscale regions within the HEA characterized by oxygen, zirconium and titanium (O, Zr, Ti)-rich atomic complexes. Formation of these complexes was promoted by chemical short-range ordering among matrix elements within the HEAs. In face-centered cubic HEAs, carbon was reported to improve strength and ductility by lowering stacking fault energy and increasing lattice friction stress. By contrast, ordered interstitial complexes described by Lei et al. mediated a strain-harvesting mechanism with potential for specific use in Ti, Zr, and Hf (Hafnium)-containing alloys. Interstitial elements are usually highly undesirable in such metal alloys due to their embrittlement effects and since tuning the stacking fault energy and exploitation of thermal transfer had not previously led to property enhancement in other alloys. The novel study results therefore provided insight to the role of interstitial solid solutions and the associated mechanisms of strengthening metallic materials. The work is now published in Nature. Explore further Citation: Enhanced strength and ductility in a high-entropy alloy via ordered oxygen complexes (2018, November 27) retrieved 18 August 2019 from https://phys.org/news/2018-11-strength-ductility-high-entropy-alloy-oxygen.html Oxygen is an abundant element that can form undesired impurities or ceramic phases in metallic materials, while doping the element on metal can render substrates brittle. During interactions with metallic alloys, oxygen takes a state between oxide particles and frequently occurring random interstitials to form ordered oxygen complexes. In a new study, materials scientists Zhinfeng Lei and co-workers observed that unlike in traditional interstitial strengthening, such ordered interstitial complexes could form high-entropy alloys (HEAs) with unprecedented enhancement in strength and ductility in compositionally complex solid solutions. When the scientists doped a model TiZrHfNb HEA with 2.0 atomic percent (2 at%) oxygen, they observed substantially enhanced tensile strength and ductility, breaking a longstanding conflict on strength and ductility trade-off. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.center_img Statistical analysis of STEM-HAADF and corresponding annular bright field (ABF) images conducted thereafter demonstrated that oxygen preferred interstitial positions adjacent to light-atom-rich lattice sites. Such preference was not observed in the N-2 HEA. In accordance with the solid-solution strengthening model proposed by Fleischer, the calculations for O-2 and N-2 HEAs confirmed their hardening mechanisms were of interstitial nature. Yet, unlike traditional interstitial strengthening that embrittled alloys, the presence of oxygen simultaneously increased both strength and ductility in the b.c.c TiZrHfNb HEA. The key question posed by the substructure analysis is why the addition of interstitial oxygen greatly enhanced the alloy’s work hardening capacity and ductility, compared to nitrogen-containing complexes. During plastic deformation, dislocations are typically stored and arranged in ordered patterns in metal alloys. To study such dislocation patterns in more detail, the researchers conducted high-resolution aberration-corrected STEM characterization of pre-strained specimens. At the nanoscale, oxygen-containing complexes severely distorted the local lattice, causing a large strain field around them. During deformation, the ordered oxygen complexes (OOCs) interacted with dislocations as revealed by STEM images. To further illuminate the intrinsic mechanisms at the atomic scale, the scientists conducted aberration-corrected STEM. At this point, they observed that the intrinsic features of OOCs in the O-2 HEA alloy variant enabled high work hardening due to dipolar walls that emerged with increasing stress that eventually led to higher ductility in the oxygen doped materials. Such complex-dislocation dynamics were not observed for the N-2 HEA, leading to comparatively modest ductility as a result. More information: Zhifeng Lei et al. Enhanced strength and ductility in a high-entropy alloy via ordered oxygen complexes, Nature (2018). DOI: 10.1038/s41586-018-0685-y Robert O. Ritchie. The conflicts between strength and toughness, Nature Materials (2011). DOI: 10.1038/nmat3115 Zhiming Li et al. Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off, Nature (2016). DOI: 10.1038/nature17981 Microscopic structure. a, b) Synchrotron high-energy XRD and the corresponding electron back-scattering diffraction patterns of the as-cast equiatomic TiZrHfNb and the interstitially doped solid-solution HEAs. All the as-cast HEAs have single b.c.c. lattice structure. c–e) STEM-HAADF images for the [011] b.c.c. crystal axis with differently adjusted contrast to reveal the existence of chemical short-range ordering in the O-2 HEA (TiZrHfNb)98O2, and the corresponding STEM-ABF image that reveals the ordered oxygen complexes (OOCs). Red squares represent the Zr/Ti-rich regions and yellow squares indicate the Hf/Nb-rich regions. The inset in e is an enlarged view of the OOCs, with the white arrows indicating the positions of the oxygen atom columns. f) Atom probe tomography three-dimensional reconstruction from the analysis of a specimen from the O-2 HEA. The threshold for the iso-composition surface is 3.0 at% O, highlighting the presence of OOCs. g) O composition profile as a function of the distance to the interface for a selection of particles (left axis) and evolution of the composition of the main constituents relative to their respective matrix composition (right axis). The inset shows a close-up of one such OOC, along with the {011} atomic plane imaged within the reconstruction. Ni is the number of the ith atom, while Ci and Ci, matrix are the concentrations of the ith atom in the OOCs and in the matrix, respectively. Credit: Nature, doi: https://doi.org/10.1038/s41586-018-0685-y In the study, the researchers investigated the base alloy TiZrHfNb and its optimally oxygen-doped variant (TiZrHfNb)98O2 (denoted as O-2 HEA here on) for comparison, alongside an interstitial variant with 2.0 atomic percent nitrogen (TiZrHfNb)98N2, hitherto referred as N-2 HEA. Mechanical properties of the three types of HEAs were observed using tensile stress-strain curves. A strong strengthening effect was observed for both oxygen- and nitrogen-doped HEAs. As expected from conventional interstitial strengthening, the ductility of the N-2 HEA reduced. Addition of 0.2 at% (atomic percent) oxygen to the base HEA (TiZrHfNb) improved its strength and ductility. A substantial work-hardening effect was observed for O-2 HEA compared to base-HEA and N-2 HEA, to impart an unexpected increase in ductility to the oxygen doped material. The addition of more than 3.0 at% oxygen, however, led to deterioration of the observed mechanical properties. The findings by Lei et al. showed that the strength-ductility conflict could be overcome for a class of metal alloys (HEAs), while demonstrating a completely new type of strain-hardening mechanism based on ordered interstitial complexes. The resulting high strain-hardening reserve led to increased strength and ductility. By itself, the base HEA (TiZrHfNb) is not suited for use in high-temperature applications due to oxidation problems. Alloying with antioxidant elements such as Al, Si and Cr could improve resistance to oxidation with HEAs – as also previously seen in HEA designs. The authors recommend application of such ordered interstitial strengthening mechanisms to a wider range of other alloy material classes for improved strength-ductility and strain-hardening during the development of advanced materials. Dislocation movements during deformation of the O-2 HEA. Credit: Nature, doi: 10.1038/s41586-018-0685-y © 2018 Science X Network The observations revealed regions of light atoms (Ti, Zr-rich) and regions rich in heavy atoms (Nb, Hf-rich) in the O-2 HEA. Similar zones also appeared in STEM images of the base and N-2 HEAs to confirm chemical short-range ordering among the metallic matrix elements as an inherent feature of HEAs. During deformation in any one of the three alloys, no phase transformation occurred. Ex-situ transmission electron microscopy (TEM) and in-situ mechanical testing confirmed that deformation of the three alloys occurred similarly via the process of dislocation glide. , Nature Materialslast_img read more