| 孪晶对多晶铜疲劳行为的影响 |
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| 引用本文： | 郭小龙,申勇峰,卢磊,李守新.孪晶对多晶铜疲劳行为的影响[J].金属学报,2004,40(12):1281-1284. |
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| 作者姓名： | 郭小龙 申勇峰 卢磊 李守新 |
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| 作者单位： | 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016 |
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| 基金项目： | 国家自然科学基金资助项目50201017 |
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| 摘 要： | 对含有高密度孪晶的多晶铜进行了塑性应变幅控制下的疲劳实验.结果表明,塑性应变幅小于8.14×10-4时,孪晶对 疲劳行为的影响不大;塑性应变幅大于8.14×10-4时,孪晶的约束作用、孪晶界与位错的反应及孪晶中位错的特殊组态,使多晶 铜的循环饱和应力提高,硬化曲线中应力饱和平台区延长.
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| 关 键 词： | Cu 孪晶 疲劳 位错组态 驻留滑移带 |
| 文章编号： | 0412-1961(2004)12-1281-04 |
| 收稿时间： | 2003-12-29 |
| 修稿时间： | 2004-04-19 |
EFFECTS OF TWINS ON THE FATIGUE BEHAVIOR OFPOLYCRYSTALLINE COPPER |
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| GUO Xiaolong,SHEN Yongfeng,LU Lei,LI Shouxin.EFFECTS OF TWINS ON THE FATIGUE BEHAVIOR OFPOLYCRYSTALLINE COPPER[J].Acta Metallurgica Sinica,2004,40(12):1281-1284. |
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| Authors: | GUO Xiaolong SHEN Yongfeng LU Lei LI Shouxin |
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| Affiliation: | Shenyang National Laboratory for Materials Science, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016 |
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| Abstract: | Symmetrical push-pull fatigue tests were conducted on as-electrodeposited
polycrystalline copper containing a high density of twins. It was found
that twins have different effects on fatigue hardening behavior of copper
under different plastic strain amplitudes. When plastic strain amplitude
was higher than about 8.14×10 -4, twins will elevate fatigue
saturation stress and extend stress saturation plateau because of the
interactions between twin boundaries and dislocations. |
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| Keywords: | Cu twin fatigue dislocation configuration persistent slip bands (PSBs) |
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