Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP

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	Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP
其他题名	Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP
	Yan Ying 1; Qi Yue 1; Chen Lijia 1; Li Xiaowu 1
	2016
发表期刊	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN	1003-6326
卷号	26 期号:4 页码:966-973
摘要	To explore the effect of strain rate (epsilon) over dot on the high temperature deformation characteristics of ultrafine-grained materials, the deformation and damage features as well as microstructures of ECAP-treated pure Al at different temperatures T and strain rates (epsilon) over dot were systematically studied through compression tests and microscopic observations. The increase in (epsilon) over dot eliminates strain softening at T = 473 K and secondary SBs basically disappear at 1x10(-3) s(-1); however, at 1x10(-2) s(-1), cracks are only observed at temperature below 473 K, and secondary SBs become clearer at T >= 473 K. The microstructures of ECAP-treated Al mainly consist of sub-grains (SGs). The increase in (epsilon) over dot inhibits the SG growth, thus leading to the increases both in yield strength and flow stress at high temperatures.
其他摘要	To explore the effect of strain rate e& on the high temperature deformation characteristics of ultrafine-grained materials, the deformation and damage features as well as microstructures of ECAP-treated pure Al at different temperatures T and strain rates e& were systematically studied through compression tests and microscopic observations. The increase in ? eliminates strain softening at T≤473 K, and largely enhances the yield strength and flow stress at 473-573 K. The shear deformation dominates the plastic deformation of ECAP-treated Al. Many cracks along shear bands (SBs) are formed at T≥473 K and secondary SBs basically disappear at 1×10~(-3) s~(-1); however, at 1×10~(-2) s~(-1), cracks are only observed at temperature below 473 K, and secondary SBs become clearer at T≥473 K. The microstructures of ECAP-treated Al mainly consist of sub-grains (SGs). The increase in ? inhibits the SG growth, thus leading to the increases both in yield strength and flow stress at high temperatures.
关键词	RATE SENSITIVITY MECHANICAL-PROPERTIES BEHAVIOR COPPER CU ALLOY AL MICROSTRUCTURE FEATURES METALS equal channel angular pressing (ECAP) pure Al strain rate high temperature compression deformation damage microstructure
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China]
CSCD记录号	CSCD:5702929
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/144471
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.上海市地震局
推荐引用方式 GB/T 7714	Yan Ying,Qi Yue,Chen Lijia,et al. Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2016,26(4):966-973.
APA	Yan Ying,Qi Yue,Chen Lijia,&Li Xiaowu.(2016).Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,26(4),966-973.
MLA	Yan Ying,et al."Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.4(2016):966-973.