Brittle versus ductile fracture behaviour in nanotwinned FCC crystals

被引：14

作者：

Pei, Linqing ^{[1
]}

Lu, Cheng ^{[1
]}

Tieu, Kiet ^{[1
]}

Zhao, Xing ^{[1
]}

Zhang, Liang ^{[1
]}

Cheng, Kuiyu ^{[1
]}

Michal, Guillaume ^{[1
]}

机构：

[1] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

来源：

MATERIALS LETTERS | 2015年 / 152卷

关键词：

Molecular dynamics; Nanotwinned crystal; Fracture; BOUNDARIES; NANOWIRES; CU;

D O I：

10.1016/j.matlet.2015.03.074

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Molecular dynamic simulation (MD) was used to study the brittle versus ductile fracture behaviour in nanotwinned Face Centred Cubic (FCC) crystals subjected to the uniaxial tensile deformation. A fundamental brittle versus ductile fracture is observed, which can be mainly understood in terms of the ratio of surface energy to unstable stacking fault energy or the ratio of ideal tensile strength to ideal shear strength in atomic model with a confined range of twinning spacing. Results show that the small ratio value is favourable for the brittle fracture, and vice versa, the big one supports the ductile fracture. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：65 / 67

页数：3

共 16 条

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