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
2.
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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