Orientation-related and temperature-dependent continuous grain boundary migration in multi-principal element alloys

被引：0
|
作者：
Hu, Hao [1 ]
Fu, Tao [1 ,2 ]
Li, Chuanying [1 ]
Duan, Mengye [1 ]
Yin, Deqiang [1 ]
Weng, Shayuan [1 ,3 ]
Peng, Xianghe [1 ]
机构：
[1] Chongqing Univ, Dept Engn Mech, Chongqing 400044, Peoples R China
[2] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China
[3] Hohai Univ, Coll Mech & Elect Engn, Changzhou 213022, Peoples R China
来源：
MECHANICS OF MATERIALS | 2024年 / 198卷
基金：
中国国家自然科学基金;
关键词：
Multi-principal element alloy; Grain boundary migration; Grain boundary roughening; Temperature effect; MOLECULAR-DYNAMICS; THERMAL-STABILITY; MOTION; MODEL; SEGREGATION; PLASTICITY; MOBILITY; DRAG; SIZE; NI;
D O I：
10.1016/j.mechmat.2024.105132
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Grain boundaries (GBs) significantly affect the mechanical properties of metals and alloys. In this study, we investigated using molecular dynamic simulations the migration behavior of E25 (710), E5 (310), and E37 (750) [001] symmetric tilt GBs in CoCrCuFeNi multi-principal element alloy (MPEA) and Cu samples subjected to shear deformation. In Cu, the migration of the GBs exhibits a coupled migration pattern, consistent with the Cahn model; while in MPEA, the migration pattern varies with GB angle and temperature. Both E25 (710) and E37 (750) GBs, along with higher temperatures, induce GB roughening and continuous migration in the MPEA samples. Further investigation to the effects of GB angle and temperature was conducted through microstructure evolution tracing and quantitative analysis. A model was developed to describe the temperature-dependent continuous GB migration and average flow stress in MPEA samples with E25 (710) or E37 (750) GBs. This work can help understand the mechanical behavior of GB in MPEA and provide valuable insights for the development of high-performance materials.
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页数：10
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