Temperature-Dependent Compressive Deformation Behavior of Commercially Pure Iron Processed by ECAP
查看参考文献22篇
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文摘
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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. |
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来源
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Acta Metallurgica Sinica(English Letters)
,2015,28(5):531-541 【核心库】
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DOI
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10.1007/s40195-015-0229-5
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关键词
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ECAP Fe
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Uniaxial compression
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High-temperature mechanical behavior
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Pre-annealing
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Deformation features
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Microstructure
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地址
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1.
Institute of Materials Physics and Chemistry, College of Sciences, Northeastern University, Shenyang, 110819
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Institute of Materials Physics and Chemistry, College of Sciences, Northeastern University, Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Shenyang, 110819
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1006-7191 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金
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国家教育部高等学校博士学科点专项科研基金
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the Fundamental Research Funds for the Central Universities of China
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文献收藏号
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CSCD:5427179
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