Uniaxial Strain-Induced Grain Boundary Migration in Titanium

Uniaxial Strain-Induced Grain Boundary Migration in Titanium
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钛中单轴应变引起的晶界迁移

DOI:
10.1007/s40195-021-01225-1
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发表时间:
2021-04
期刊:
Acta Metallurgica Sinica (english Letters)
影响因子:
--
通讯作者:
Jian-Ping Li
Jian-Ping Li
中科院分区:
其他
文献类型:
--
作者:
Tao Sun;Aidong Tu;Hao Wang;Shujun Li;Hui Peng;Jian-Ping Li

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采用分子动力学模拟方法研究了具有90°晶界的双晶模型在平行于晶界法线方向的压缩和拉伸载荷作用下的力学响应。发现晶界在压缩和拉伸变形时沿沿着两个相反的方向迁移,形成相互连接的共格孪晶界和基底/棱柱晶界。这种晶界迁移的原子细节被解开,这表明界面位错的作用。并对温度效应进行了讨论。
The mechanical response of a bi-crystal model with a 90° grain boundary under external compressive and tensile loading parallel to the boundary plane normal was investigated with molecular dynamics simulations. The grain boundary was found to migrate along two opposite directions upon compressive and tensile straining, with the formation of inter-connected coherent twin boundary and basal/prismatic boundary. The atomic details of such grain boundary migration were unraveled, which indicated the role of interface dislocations. The temperature effect was also discussed.
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