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典型文献
Endless recrystallization of high-entropy alloys at high temperature
文献摘要:
In traditional physical metallurgy,once recrystallization occurs,it will proceed to 100%along with time even at relatively low temperatures,resulting in the limited thermal stability of partially recrystallized al-loys.Here,we proposed the strategy of achieving the endless recrystallization state at high temperature(~0.6Tm)in high entropy alloys for the first time.The partially recrystallized microstructures remained stable after annealing at 700℃ for 1440 h toward endless recrystallization with kinetics analysis.Ben-efiting from the ultra-thermostable heterostructures,the alloy exhibited excellent mechanical properties of~1.6 GPa tensile strength at room temperature and~1.1 GPa tensile strength at 600℃ even after exposure at 700℃ for 720 h.The kinetics of recovery,recrystallization,grain growth,and precipitate coarsening were quantitatively analyzed to uncover the mechanisms of endless recrystallization.The re-sults revealed that the stable state of 50%recrystallization at 700℃ can be attributed to the precipitates inhibited recrystallization and the continued recovery decreased stored energy in the non-recrystallized regions.Furthermore,the grain size was stable in the recrystallized regions due to the strong pinning ef-fect of the intergranular precipitates with slow coarsening rates.These findings created a brand-new state of endless recrystallization with the combination of recovery and recrystallization,which can significantly broaden the service temperature range of heterogeneous materials.
文献关键词:
作者姓名:
Qingfeng Wu;Zhijun Wang;Feng He;Zhongsheng Yang Junjie Li;Jincheng Wang
作者机构:
State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China
引用格式:
[1]Qingfeng Wu;Zhijun Wang;Feng He;Zhongsheng Yang Junjie Li;Jincheng Wang-.Endless recrystallization of high-entropy alloys at high temperature)[J].材料科学技术(英文版),2022(33):71-81
A类:
6Tm,efiting
B类:
Endless,recrystallization,high,entropy,alloys,In,traditional,physical,metallurgy,once,occurs,will,proceed,along,even,relatively,temperatures,resulting,limited,thermal,stability,partially,recrystallized,Here,proposed,strategy,achieving,endless,state,first,microstructures,remained,after,annealing,toward,kinetics,analysis,Ben,from,ultra,thermostable,heterostructures,exhibited,excellent,mechanical,properties,GPa,tensile,strength,room,exposure,recovery,grain,growth,coarsening,were,quantitatively,analyzed,uncover,mechanisms,sults,revealed,that,be,attributed,precipitates,inhibited,continued,decreased,stored,energy,regions,Furthermore,size,was,due,strong,pinning,fect,intergranular,slow,rates,These,findings,created,brand,new,combination,which,significantly,broaden,service,range,heterogeneous,materials
AB值:
0.512219
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