Temperature-dependent fatigue response of a Fe44Mn36Co10Cr10 high entropy alloy: A coupled in-situ electron microscopy study and crystal plasticity simulation

被引：13
作者：
Han, Qinan [1 ,2 ]
Lei, Xusheng [1 ,2 ,3 ]
Rui, Shao-Shi [4 ,5 ]
Su, Yue [6 ]
Ma, Xianfeng [7 ]
Cui, Haitao [1 ,2 ]
Shi, Huiji [5 ]
机构：
[1] Minist Ind & Informat Technol, Aeroengine Thermal Environm & Struct Key Lab, Nanjing 210016, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Nanjing 210016, Peoples R China
[3] First Aircraft Inst, AVIC, Xian 710089, Peoples R China
[4] Tsinghua Univ, AMPTL, Dept Mech Engn, Beijing 100084, Peoples R China
[5] Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China
[6] Northwestern Polytech Univ, Sch Power & Energy, Xian 710072, Peoples R China
[7] Sun Yat Sen Univ, SinoFrench Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 151卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloy; In-situ SEM observation; Crack initiation; EBSD; Crystal plasticity; DISLOCATION DENSITY; DEFORMATION MECHANISMS; LOCALIZED DEFORMATION; BEHAVIOR; EBSD; MICROSTRUCTURE; ORIENTATION; TEXTURE; POLYCRYSTALS; INDENTATION;
D O I：
10.1016/j.ijfatigue.2021.106385
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The fatigue behavior of Fe44Mn36Co10Cr10 high entropy alloy (HEA) at room temperature and 300 degrees C was studied by in-situ SEM observation, electron back-scattered diffraction (EBSD) and crystal plasticity simulation. The microstructure evolution and deformation process was observed by in-situ SEM fatigue experiment. The misorientation and geometrically necessary dislocation (GND) density was analyzed by EBSD. A crystal plasticity finite element (CPFE) modeling method based on the real grain morphology was proposed. The cumulative plastic strain, dominant slip system and dominant slip plane distributions were obtained. CPFE simulation shows multiple dominant slip systems being activated, which agrees with the multiple slip phenomena observed by insitu SEM.
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页数：14
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