IMR OpenIR
Enhanced cyclic deformation responses of ultrafine-grained Cu and nanocrystalline Cu-Al alloys
X. H. An; S. D. Wu; Z. G. Wang; Z. F. Zhang
2014
Source PublicationActa Materialia
ISSN1359-6454
Volume74Pages:200-214
AbstractCyclic deformation responses of ultrafine-grained (UFG) Cu and nanocrystalline (NC) Cu Al alloys produced by equal channel angular pressing were investigated systematically by applying low-cycle fatigue (LCF) and high-cycle fatigue (HCF) tests. Based on the dependence of the fatigue life (N-f) on the total strain amplitude (Delta epsilon(t)/2) and stress amplitude (Delta sigma/2) in comparison with that of UFG Cu, the LCF life and HCF strength, especially fatigue endurance limits, of NC Cu Al alloys, were enhanced strikingly at the same time as their stacking fault energies (SFE) decreased. These upgraded fatigue performances with lowering of the SFE in NC Cu Al alloys can be attributed not only to the simultaneous increase in their monotonic strength and ductility on the macroscale, but also to the crucially decreased cyclic softening behavior on the microscale. It was found that substantial grain growth and large-scale shear bands, both of which are essential ingredients, resulting in significant cyclic softening and then deterioration in the LCF life of UFG and NC materials, were reduced advantageously on decreasing the SFE in NC Cu-Al alloys. Moreover, the dominant fatigue damage micro-mechanism was also transformed inherently from extensive grain boundary (GB) migration in UFG Cu to other local GB activities such as atom shuffling or GB sliding/rotation in NC Cu Al alloy with low SFE. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[an, x. h. ; wu, s. d. ; wang, z. g. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; an, xh (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; anxianghai@gmail.com ; zhfzhang@imr.ac.cn
KeywordUltrafine-grained Cu Nanocrystalline Cu-al Alloys Stacking Fault Energy Cyclic Softening Fatigue Damage Mechanism Severe Plastic-deformation Stacking-fault Energy Crack Growth Resistance Stress-strain Response High-pressure Torsion Microstructural Evolution Fatigue Behavior Mechanical-properties Nanostructured Cu Copper
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73186
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
X. H. An,S. D. Wu,Z. G. Wang,et al. Enhanced cyclic deformation responses of ultrafine-grained Cu and nanocrystalline Cu-Al alloys[J]. Acta Materialia,2014,74:200-214.
APA X. H. An,S. D. Wu,Z. G. Wang,&Z. F. Zhang.(2014).Enhanced cyclic deformation responses of ultrafine-grained Cu and nanocrystalline Cu-Al alloys.Acta Materialia,74,200-214.
MLA X. H. An,et al."Enhanced cyclic deformation responses of ultrafine-grained Cu and nanocrystalline Cu-Al alloys".Acta Materialia 74(2014):200-214.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[X. H. An]'s Articles
[S. D. Wu]'s Articles
[Z. G. Wang]'s Articles
Baidu academic
Similar articles in Baidu academic
[X. H. An]'s Articles
[S. D. Wu]'s Articles
[Z. G. Wang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[X. H. An]'s Articles
[S. D. Wu]'s Articles
[Z. G. Wang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.