Atomistic studies of shock-induced phase transformations in single crystal iron with cylindrical nanopores

被引：19

作者：

Wu, Li ^{[1
]}

Wang, Kun ^{[2
]}

Xiao, Shifang ^{[1
]}

Deng, Huiqiu ^{[1
]}

Zhu, Wenjun ^{[2
]}

Hu, Wangyu ^{[3
]}

机构：

[1] Hunan Univ, Sch Phys & Elect, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China

[2] Inst Fluid Phys, Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Peoples R China

[3] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2016年 / 122卷

基金：

中国国家自然科学基金;

关键词：

Phase transformation; Variants; Cylindrical nanopores; Transformation kinetics; NEMD; MOLECULAR-DYNAMICS; PLASTIC-DEFORMATION; STAINLESS-STEELS; VOID GROWTH; SIMULATION; NUCLEATION; MARTENSITE; TRANSITION; COPPER; METAL;

D O I：

10.1016/j.commatsci.2016.05.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Non-equilibrium molecular-dynamic simulations with our modified analytic embedded-atom model potential were carried out on single crystalline iron of idealized cylindrical nanopores to study the effect of defect on shock response. The results showed that the shock response and phase transformation were influenced by cylindrical nanopores. Reflection wave, "hot spot" can be clearly observed under [001], [110] and [111] loading directions, and the nucleation and growth of dislocations appeared for the shock along [110] and [111] directions. The critical stress of phase transformation, the nucleation sites and martensitic variants were obviously influenced by the cylindrical nanopores. In addition, stress assisted transformation mechanisms and strain induced transformation mechanisms were discussed, and the kinetics of the variants which caused by the presence of cylindrical pores were studied. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1 / 10

页数：10

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