Shear bands evolution in ultrafine-grained aluminium under cyclic loading

被引：18
作者：
Malekjani, Shokoufeh [1 ]
Hodgson, Peter D. [1 ]
Stanford, Nicole E. [1 ]
Hilditch, Timothy B. [2 ]
机构：
[1] Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia
[2] Deakin Univ, Sch Engn, Waurn Ponds, Vic 3216, Australia
来源：
SCRIPTA MATERIALIA | 2013年 / 68卷 / 10期
基金：
澳大利亚研究理事会;
关键词：
Ultrafine-grained microstructure; Low-cycle fatigue; Shear bands; Microstructural instabilities; DEFORMATION RESPONSE; FATIGUE; COPPER; AL;
D O I：
10.1016/j.scriptamat.2013.02.001
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructural response and deformation mechanisms under cyclic and monotonic loading were investigated in a commercially pure Al subjected to grain refinement by cryorolling. A fatigue dependent shear banding and grain coarsening was detected and it was shown that pre-existing shear bands induced by cryorolling play a vital role in this regard. A rapid initial cyclic softening dominated by activation of pre-existing shear bands is replaced by a more gradual cyclic softening dominated by grain coarsening within these shear bands. (c) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：821 / 824
页数：4
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