典型文献
Dynamic deformation behavior of a FeCrNi medium entropy alloy
文献摘要：
Deformation behavior of a FeCrNi medium entropy alloy(MEA)prepared by powder metallurgy(P/M)method was investigated over a wide range of strain rates.The FeCrNi MEA exhibits high strain-hardening ability,which can be attributed to the multiple deformation mechanisms,including dislocation slip,de-formation induced stacking fault and mechanical twinning.The shear localization behavior of the FeCrNi MEA was also analyzed by dynamically loading hat-shaped specimens,and the distinct adiabatic shear band cannot be observed until the shear strain reaches～14.5.The microstructures within and outside the shear band exhibit different characteristics:the grains near the shear band are severely elongated and significantly refined by dislocation slip and twinning;inside the shear band,the initial coarse grains completely disappear,and transform into recrystallized ultrafine equiaxed grains by the classical rota-tional dynamic recrystallization mechanism.Moreover,microvoids preferentially nucleate in the central areas of the shear band where the temperature is very high and the shear stress is highly concentrated.These microvoids will coalesce into microcracks with the increase of strain,which eventually leads to the fracture of the shear band.
文献关键词：
中图分类号：
作者姓名：
Ao Fu;Bin Liu;Zezhou Li;Bingfeng Wang;Yuankui Cao;Yong Liu
作者机构：
State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Department of Mechanical and Aerospace Engineering,University of California,San Diego,United States;School of Materials Science and Engineering,Central South University,Changsha 410083,China
文献出处：
引用格式：
[1]Ao Fu;Bin Liu;Zezhou Li;Bingfeng Wang;Yuankui Cao;Yong Liu-.Dynamic deformation behavior of a FeCrNi medium entropy alloy)[J].材料科学技术（英文版）,2022(05):120-128
A类：
FeCrNi
B类：
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AB值：
0.586327
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