| 多晶体金属疲劳寿命随晶粒尺寸变化的理论研究 |
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| 引用本文： | 李眉娟,胡海云,邢修三.多晶体金属疲劳寿命随晶粒尺寸变化的理论研究[J].物理学报,2003,52(8):2092-2095. |
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| 作者姓名： | 李眉娟 胡海云 邢修三 |
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| 作者单位： | 北京理工大学应用物理系，北京 100081 |
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| 摘 要： | 在疲劳断裂非平衡统计理论框架的基础上，根据界面能模型，推导出了多晶体金属的疲劳寿 命随晶粒尺寸、应变振幅的变化公式.还与有关实验结果进行了比较，发现理论与实验较为 相符.
关键词：
疲劳寿命
晶粒尺寸
非平衡统计理论
界面能模型
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| 关 键 词： | 疲劳寿命 晶粒尺寸 非平衡统计理论 界面能模型 |
| 文章编号： | 1000-3290/2003/52(08)2092-04 |
| 收稿时间： | 2002-10-23 |
| 修稿时间： | 2002年10月23 |
The relationship between fatigue life and grain size of polycrystalline metals |
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| Li Mei-Juan,Hu Hai-Yun and Xing Xiu-San.The relationship between fatigue life and grain size of polycrystalline metals[J].Acta Physica Sinica,2003,52(8):2092-2095. |
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| Authors: | Li Mei-Juan Hu Hai-Yun and Xing Xiu-San |
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| Abstract: | In order to explore the effect of grain size on fatigue life, a formula of fatig ue life for polycrystalline metals,which depends on the grain size and cyclic st rain amplitude, is derived based on the non-equilibrium statistical theory of fa tigue fracture and the model of interface energy. Subsequently, the fatigue life s of pure copper and 70-30 brass with different grain sizes are calculated accor ding to the formula which is achieved in this paper, and the results are in agre ement with the experimental results. |
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| Keywords: | fatigue life grain size non-equilibrium statistical theory model of interface energy |
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