A convergence relationship between slip transmission and grain boundary migration in nanocrystalline nickel

被引：0
|
作者：
Jiang, Zhihao [1 ]
Jiang, Zhouwen [1 ]
Yuan, Shengyun [1 ]
Liang, Ningning [2 ]
Xu, Shun [3 ]
Chen, Xiang [2 ]
Liang, Jiamiao [4 ]
Suo, Tao [5 ]
Zhang, Yong [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Herbert Gleiter Inst Nanosci, Nanjing 210094, Peoples R China
[2] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nano & Heterogeneous Mat Ctr, Nanjing 210094, Peoples R China
[3] Soochow Univ, Shagang Sch Iron & Steel, Suzhou 215000, Peoples R China
[4] Shanghai Jiao Tong Univ, Shanghai Key Lab Adv High Temp Mat & Forming, Shanghai 200240, Peoples R China
[5] Northwestern Polytech Univ, Sch Aeronaut, Xian 710072, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2021年 / 178卷
关键词：
Nanocrystalline; Nickel; Stress-driven grain boundary migration; High strain rate; Slip transmission; GROWTH; DEFORMATION; DISLOCATIONS; MECHANISMS; DEPENDENCE;
D O I：
10.1016/j.matchar.2021.111295
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present study, a geometric factor M proposed to predict slip transmission across grain boundaries (GBs) was lent to explore the factors influencing the stress-driven GB migration behaviors in nanocrystalline nickel under high strain rate loading. By confronting the relationship between slip systems in neighboring grain of the samples before and after high-rate loading, it is found that the geometric factor M of the remaining nano-grains in the impacted samples shifts to smaller values. This apparent correlation between GB migration and the geometric factor M can be understood in terms of two factors: the angle alpha between slip plane traces on the GB and the residual dislocation deposited at the GB plane to ensure the Burgers vector unity. Both contribute to slip transmission across GBs.
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页数：9
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