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Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP
Alternative TitleTemperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP
Yan Ying1; Qi Yue1; Jiang QingWei1; Li XiaoWu1
2015
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Volume28Issue:5Pages:531-541
AbstractTo 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.
Other AbstractTo 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.
KeywordULTRAFINE-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
Indexed ByCSCD
Language英语
Funding Project[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 IDCSCD:5427179
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/146892
Collection中国科学院金属研究所
Affiliation1.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
Recommended Citation
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.
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