孪晶界对α-Fe合金力学性能影响的模拟

Q3 Materials Science Hangkong Cailiao Xuebao/Journal of Aeronautical Materials Pub Date : 2017-01-01 DOI:10.11868/j.issn.1005-5053.2016.000134

许天旱, Xu Tianhan, 何松, He Song

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引用次数: 1

摘要

采用分子动力学方法研究在单轴拉伸载荷下孪晶界间距和孪晶界与拉伸载荷角度对纳米孪晶铁力学行为的影响。结果表明：纳米孪晶铁的屈服强度随着孪晶界间距的增大而增大，呈现反常的Hall-Petch关系；单晶铁中出现变形孪晶，此时其塑性变形以变形孪晶为主；弹性模量随孪晶界间距增大有轻微的增大；拉伸载荷与孪晶界不垂直时，屈服应力降低，变形方式则以去孪晶为主。

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