Influence of Cu precipitation on tensile properties of Fe-Cu-Ni ternary alloy at different temperatures by molecular dynamics simulation

被引：24

作者：

You, Li-Juan ^{[1
]}

Hu, Li-Juan ^{[1
]}

Xie, Yao-Ping ^{[1
]}

Zhao, Shi-Jin ^{[1
]}

机构：

[1] Shanghai Univ, Sch Mat Sci & Engn, Inst Mat Sci, Key Lab Microstruct, Shanghai 200072, Peoples R China

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2016年 / 118卷

基金：

中国国家自然科学基金;

关键词：

Cu precipitation; Fe-Cu-Ni ternary alloy; Molecular dynamics; Tensile properties; Temperature; ATOMIC-SCALE SIMULATIONS; BICRYSTAL INTERFACES; EDGE DISLOCATION; ALPHA-IRON; MULTISCALE SIMULATIONS; MECHANICAL-PROPERTIES; COPPER PRECIPITATION; COMPUTER-SIMULATION; MICROALLOYED STEEL; VACANCY CLUSTERS;

D O I：

10.1016/j.commatsci.2016.03.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of Cu precipitation on the tensile properties of Fe-1.1% Cu-0.9% Ni ternary alloy at different temperatures are analyzed using molecular dynamics ( MD) method. The local lattice structural transition around Cu-rich clusters is generated by Cu-rich clusters forming during continuous cooling process. The formation of Cu-rich clusters and matrix of local lattice structural transition result in the decrease of tensile yield strength of the matrix material at room temperature. Therefore, the matrix becomes brittle and tends to fracture in the local structural transition area. It has been found that the formation of Cu-rich clusters reduces the yield strength of the matrix more greatly at aging temperature than room temperature. Furthermore, the higher the temperature is, the greater the degree is. Cu-rich clusters play a significant role in strengthening material at early stage, while the material strength decreases with time increase. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：236 / 244

页数：9

共 59 条

[31] Structural stability and lattice defects in copper:: Ab initio, tight-binding, and embedded-atom calculations -: art. no. 224106 [J].