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Effect of equal-channel angular pressing on room temperature superplasticity of quasi-single phase Zn-0.3Al alloy
Demirtas, M.; Purcek, G.; Yanar, H.; Zhang, Z. J.; Zhang, Z. F.; purcek@ktu.edu.tr
2015
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume644Pages:17-24
AbstractQuasi-single phase (dilute) Zn-0.3Al alloy was subjected to severe plastic deformation via equal-channel angular extrusion/pressing (ECAE/P), and the effects of ECAP on its room temperature (RT) and high strain rate (HSR) superplasticity and deformation mechanism were investigated. Multi-pass ECAP may refine the coarse-grained microstructure into the fine grained (FG) one. The grain size of Zn-matrix phase decreased down to 2.0 mu m after ECAP. Many spherical Al-rich precipitates decomposed and homogeneously distributed inside the matrix phase. They are ultrafine grained (UFG) beta-particles with the grain sizes ranging from 50 nm to similar to 200 nm. This special microstructure having FG and UFG micro-constituents brought about an improvement in RI superplasticity even at HSRs. While multi-pass ECAP decreased flow stress of the alloy, its elongation to failure increased substantially depending on the initial strain rates. The maximum elongation was 1000% at a low strain rate of 10(-4) s(-1), and 350% elongation was achieved at a high strain rate of 10(-2) s(-1). Grain boundary sliding (GBS) was found to be the main deformation mechanism in region-II as the optimum superplastic region. (C) 2015 Elsevier B.V. All rights reserved.
description.department[demirtas, m.] bayburt univ, dept mech engn, tr-69000 bayburt, turkey ; [purcek, g. ; yanar, h.] karadeniz tech univ, dept mech engn, tr-61080 trabzon, turkey ; [zhang, z. j. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
KeywordRoom Temperature Superplasticity Dilute Zn-al Alloys Fine-grained Microstructure Severe Plastic Deformation
Funding OrganizationKaradeniz Technical University, Turkey [10501]
Indexed Bysci
Language英语
WOS IDWOS:000361258200003
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74748
Collection中国科学院金属研究所
Corresponding Authorpurcek@ktu.edu.tr
Recommended Citation
GB/T 7714
Demirtas, M.,Purcek, G.,Yanar, H.,et al. Effect of equal-channel angular pressing on room temperature superplasticity of quasi-single phase Zn-0.3Al alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,644:17-24.
APA Demirtas, M.,Purcek, G.,Yanar, H.,Zhang, Z. J.,Zhang, Z. F.,&purcek@ktu.edu.tr.(2015).Effect of equal-channel angular pressing on room temperature superplasticity of quasi-single phase Zn-0.3Al alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,644,17-24.
MLA Demirtas, M.,et al."Effect of equal-channel angular pressing on room temperature superplasticity of quasi-single phase Zn-0.3Al alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 644(2015):17-24.
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