| 金属材料微塑性变形的研究 |
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| 引用本文： | 张力宁.金属材料微塑性变形的研究[J].东南大学学报(自然科学版),1986(6). |
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| 作者姓名： | 张力宁 |
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| 作者单位： | 南京工学院材料科学与工程系 |
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| 摘 要： | 本文讨论了微塑性变形对金属零构件力学行为的意义。对20Cr、40Cr及60Si2Mn等钢试样的实验研究表明,微塑性变形抗力既受到显微组织结构的影响,又受到残余应力的影响。微塑性变形与试样中的残余应力之间有着密切的关系。由此观点出发,提出了对负残余应变现象的解释。对于不同应力水平下循环加载时微塑性变形的变化情况也进行了测试,并将此结果与疲劳过程中残余应力松弛的规律进行了比较与分析。
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| 关 键 词： | 微塑性 微屈服 残余应力 残余应变 松弛 循环加载 |
A Study on Microplastic Deformation of Metallic Materials |
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| Zhang Lining Dept. of Materials Science and Engineering.A Study on Microplastic Deformation of Metallic Materials[J].Journal of Southeast University(Natural Science Edition),1986(6). |
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| Authors: | Zhang Lining Dept of Materials Science and Engineering |
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| Institution: | Zhang Lining Dept. of Materials Science and Engineering |
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| Abstract: | The significance of microplastic deformation in relation to the mechanical behaviour of metal components is discussed. The experiment on specimens of 20Cr, 40Cr and 60Si2Mn shows that the resistance to microplastic deformation is affected by both microstructure and residual stress involved in specimens. There exists a close relation between microplastic deformation and residual stress. From this point of view, the author presents a model to explain the negative residual strain phenomenon. The variation of microplastic deformation during cyclic loading is tested with different peak stress and the results are compared with the regularities of residual stress relaxation in fatigue. |
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| Keywords: | microplasticity microyield residual stress residual strain rela xation cyclic loading |
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