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

页码：821 / 824

页数：4

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