Strengthening-softening transition in yield strength of nanotwinned Cu

被引：29
|
作者：
Xiao, Jianwei [1 ]
Yang, Huizhen [1 ]
Liu, Hexiong [1 ]
Younus, Fatima [1 ]
Xu, Bo [1 ]
Zhang, Xiangyi [1 ]
Wang, Yanbin [2 ]
Wen, Bin [1 ]
机构：
[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
[2] Univ Chicago, Ctr Adv Radiat Sources, Chicago, IL 60439 USA
来源：
SCRIPTA MATERIALIA | 2019年 / 162卷
基金：
中国国家自然科学基金;
关键词：
Nanotwins; Dislocation; Yield strength; Molecular dynamics; COHERENT TWIN BOUNDARIES; STRAIN-RATE SENSITIVITY; COLUMNAR-GRAINED CU; DEFORMATION MECHANISMS; DISPLACEMENT FIELD; MAXIMUM STRENGTH; PEIERLS STRESS; FLOW-STRESS; DISLOCATIONS; DUCTILITY;
D O I：
10.1016/j.scriptamat.2018.11.049
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
It is known that the strength of nanotwinned copper increases with decreasing twin thickness, reaches a maximum at twin thickness of 15 nm, and then decreases with twin thickness down to 4 nm. To understand this behavior, critical resolved shear stresses of various slip modes in nanotwinned copper are investigated using molecular dynamics simulations. Based on the Sachs polycrystalline model, twin thickness dependent yield strengths are deduced that are in good agreement with experimental data. The strengthening-softening behavior is attributed to a transition from partial dislocations slipping in twin boundaries to detwinning induced by incoherent twin boundary migration. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：372 / 376
页数：5
相关论文
共 50 条
  • [1] Strengthening-softening transition and maximum strength in Schwarz nanocrystals
    Hanzheng Xing
    Jiaxi Jiang
    Yujia Wang
    Yongpan Zeng
    Xiaoyan Li
    [J]. NanoMaterialsScience, 2024, 6 (03) : 320 - 328
  • [2] Strengthening-softening transition and maximum strength in Schwarz nanocrystals
    Xing, Hanzheng
    Jiang, Jiaxi
    Wang, Yujia
    Zeng, Yongpan
    Li, Xiaoyan
    [J]. NANO MATERIALS SCIENCE, 2024, 6 (03) : 320 - 328
  • [3] STRENGTHENING-SOFTENING OF STEELS AND ALLOYS
    EFIMOV, VN
    ZHADKEVICH, ML
    [J]. RUSSIAN METALLURGY, 1989, (05): : 143 - 149
  • [4] Severe plastic deformation-produced gradient nanostructured copper with a strengthening-softening transition
    Wu, Bo
    Fu, Hui
    Zhou, Xiaoye
    Qian, Lei
    Luo, Jiasi
    Zhu, Jiaming
    Lee, Wing Bun
    Yang, Xu-Sheng
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2021, 819
  • [5] High temperature structural intermetallics and their strengthening-softening mechanisms
    Guo, Jian-Ting
    Zhou, Lan-Zhang
    Li, Gu-Song
    [J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals, 2011, 21 (01): : 1 - 34
  • [6] Amorphous Thickness-Dependent Strengthening-Softening Transition in Crystalline-Amorphous Nanocomposites
    Qian, Lei
    Yang, Wenqing
    Luo, Jiasi
    Wang, Yunjiang
    Chan, K. C.
    Yang, Xu-Sheng
    [J]. NANO LETTERS, 2023, 23 (23) : 11288 - 11296
  • [7] Dislocation mechanisms in strengthening and softening of nanotwinned materials
    Wang, Han
    Rimoli, Julian J.
    Cao, Penghui
    [J]. JOURNAL OF APPLIED PHYSICS, 2023, 133 (05)
  • [8] Two softening stages in nanotwinned Cu
    Sun, Ligang
    He, Xiaoqiao
    Zhu, Linli
    Lu, Jian
    [J]. PHILOSOPHICAL MAGAZINE, 2014, 94 (35) : 4037 - 4052
  • [9] Strain hardening and softening in nanotwinned Cu
    Niu, Rongmei
    Han, Ke
    [J]. SCRIPTA MATERIALIA, 2013, 68 (12) : 960 - 963
  • [10] Nanotwinned fcc metals: Strengthening versus softening mechanisms
    Stukowski, A.
    Albe, K.
    Farkas, D.
    [J]. PHYSICAL REVIEW B, 2010, 82 (22):
12345