典型文献
Origin of superior low-cycle fatigue resistance of an interstitial metastable high-entropy alloy
文献摘要：
In this study,the deformation behaviors and related microstructural evolutions were investigated in ei-ther monotonic or cyclic deformation modes in an interstitial metastable high-entropy alloy.These inves-tigations aimed to reveal the mechanisms underlying the superior low-cycle fatigue(LCF)life of this alloy.A thermomechanical process was applied to induce fine-grained(FG)and coarse-grained(CG)microstruc-tures in Fe-30Mn-10Co-1OCr-0.4C(atomic percentage)alloy.Their superior combination of strength and ductility was attributed to the appearance of deformation-induced ε-martensite and the presence of car-bon.The CG alloy showed a greater volume fraction of ε-martensite than the FG alloy in the monotonic deformation mode,and vice versa in the cyclic mode.Such a disparity was interpreted in light of the back-stress effect of the relaxed y-grain boundaries in the latter mode.Meanwhile,the γ-to-ε phase transformation under cyclic loading at low strain amplitudes(0.4％)barely led to an improved fatigue life as compared with that at higher strain amplitudes(≥0.55％).The high reversibility of partial disloca-tion motions under cyclic loading and delaying the formation of dislocation cells through the martensitic transformation could explain why the alloys investigated in this study exhibited a superior LCF life com-pared with high-entropy alloys reported in previous studies.
文献关键词：
中图分类号：
作者姓名：
Seyed Amir Arsalan Shams;Jae Wung Bae;Jae Nam Kim;Hyoung Seop Kim;Taekyung Lee;Chong Soo Lee
作者机构：
Graduate Institute of Ferrous Technology,Pohang University of Science and Technology,Pohang 37673,Republic of Korea;Department of Materials Science and Engineering,Pohang University of Science and Technology,Pohang 37673,Republic of Korea;School of Mechanical Engineering,Pusan National University,Busan 46241,Republic of Korea
文献出处：
引用格式：
[1]Seyed Amir Arsalan Shams;Jae Wung Bae;Jae Nam Kim;Hyoung Seop Kim;Taekyung Lee;Chong Soo Lee-.Origin of superior low-cycle fatigue resistance of an interstitial metastable high-entropy alloy)[J].材料科学技术（英文版）,2022(20):115-128
A类：
tigations,1OCr,disloca
B类：
Origin,superior,low,cycle,fatigue,resistance,interstitial,metastable,entropy,In,this,study,deformation,behaviors,related,microstructural,evolutions,were,investigated,monotonic,cyclic,modes,These,aimed,reveal,mechanisms,underlying,LCF,life,thermomechanical,process,was,applied,fine,grained,FG,coarse,CG,tures,30Mn,10Co,4C,atomic,percentage,Their,combination,strength,ductility,attributed,appearance,induced,martensite,presence,car,bon,showed,greater,volume,fraction,than,vice,versa,Such,disparity,interpreted,light,back,stress,effect,relaxed,boundaries,latter,Meanwhile,phase,transformation,loading,strain,amplitudes,barely,led,improved,compared,that,higher,reversibility,partial,motions,delaying,dislocation,cells,through,martensitic,could,explain,why,alloys,exhibited,reported,previous,studies
AB值：
0.520797
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