Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP

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	Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP
其他题名	Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP
	Yan Ying 1; Qi Yue 1; Jiang QingWei 1; Li XiaoWu 1
	2015
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
卷号	28 期号:5 页码:531-541
摘要	To explore the temperature dependence of deformation behavior of BCC structural materials and the relevant effect of pre-annealing, commercially pure iron (CP Fe) produced by equal-channel angular pressing (ECAP) is selected as the experimental material. The influences of deformation temperature T and pre-annealing on deformation behavior, surface deformation characteristics and substructures of ECAP Fe were systematically studied. The results show that ECAP Fe undergoes a remarkable strain softening stage after a rapid strain hardening during uniaxial compression, and the softening degree and the yield strength sigma(YS) first decrease and then increase with raising temperature. Pre-annealing at 400 degrees C effectively weakens the strain softening degree and increases sigma(YS). To understand the influence of deformation temperature on deformation behavior, as well as the relevant pre-annealing effect, deformation and damage characteristics and dislocation structures are studied in detail. In a word, the strain softening of ECAP Fe is associated not only with internal structural instability, but also with temperature, and pre-annealing at 400 degrees C improves high-temperature mechanical properties of ECAP Fe.
其他摘要	To explore the temperature dependence of deformation behavior of BCC structural materials and the relevant effect of pre-annealing, commercially pure iron (CP Fe) produced by equal-channel angular pressing (ECAP) is selected as the experimental material. The influences of deformation temperature T and pre-annealing on deformation behavior, surface deformation characteristics and substructures of ECAP Fe were systematically studied. The results show that ECAP Fe undergoes a remarkable strain softening stage after a rapid strain hardening during uniaxial compression, and the softening degree and the yield strength σ_(YS) first decrease and then increase with raising temperature. Pre-annealing at 400 ℃ effectively weakens the strain softening degree and increases σ_(YS). To understand the influence of deformation temperature on deformation behavior, as well as the relevant pre-annealing effect, deformation and damage characteristics and dislocation structures are studied in detail. In a word, the strain softening of ECAP Fe is associated not only with internal structural instability, but also with temperature, and pre-annealing at 400 ℃ improves high-temperature mechanical properties of ECAP Fe.
关键词	ULTRAFINE-GRAINED COPPER SEVERE PLASTIC-DEFORMATION MECHANICAL-PROPERTIES DAMAGE BEHAVIOR TITANIUM METALS STABILITY FEATURES ECAP Fe Uniaxial compression High-temperature mechanical behavior Pre-annealing Deformation features Microstructure
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Specialized Research Fund for the Doctoral Program of Higher Education of China] ; [Fundamental Research Funds for the Central Universities of China]
CSCD记录号	CSCD:5427179
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/321006/146892
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.Kunming Univ Sci & Technol, Coll Materials Sci & Engn, Kunming 650093, Peoples R China 3.上海市地震局
推荐引用方式 GB/T 7714	Yan Ying,Qi Yue,Jiang QingWei,et al. Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2015,28(5):531-541.
APA	Yan Ying,Qi Yue,Jiang QingWei,&Li XiaoWu.(2015).Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP.ACTA METALLURGICA SINICA-ENGLISH LETTERS,28(5),531-541.
MLA	Yan Ying,et al."Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP".ACTA METALLURGICA SINICA-ENGLISH LETTERS 28.5(2015):531-541.