Experimental investigation on strain rate sensitivity of ultra-fine grained copper at elevated temperatures

Tao Suo; Yu Long Li; Kui Xie; Feng Zhao; Ke Shi Zhang; Qiong Deng

doi:10.1016/j.mechmat.2011.02.002

Experimental investigation on strain rate sensitivity of ultra-fine grained copper at elevated temperatures

Tao Suo, Yu Long Li, Kui Xie, Feng Zhao, Ke Shi Zhang, Qiong Deng

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43 引用（Scopus）

摘要

Quasi-static and dynamic compression tests on ultra-fine grained (UFG) copper (Cu 99.9) were performed at temperatures ranging from 77 to 573 K and strain rates ranging from 10^-3 to 5 × 10³ 1/s using an electronic universal testing machine and the split Hopkinson pressure bar system, respectively. We focused on the strain rate sensitivity and its dependence on experimental temperatures. The results show that UFG-Cu has enhanced strain rate sensitivity that is apparently temperature dependent. The activation volume of UFG-Cu is estimated to be on the order of ∼10b ³ at current experimental temperature and strain rate range. The plastic deformation mechanism is suggested to be dislocation-grain boundary interactions.

源语言	英语
页（从-至）	111-118
页数	8
期刊	Mechanics of Materials
卷	43
期	3
DOI	https://doi.org/10.1016/j.mechmat.2011.02.002
出版状态	已出版 - 3月 2011

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10.1016/j.mechmat.2011.02.002

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title = "Experimental investigation on strain rate sensitivity of ultra-fine grained copper at elevated temperatures",

abstract = "Quasi-static and dynamic compression tests on ultra-fine grained (UFG) copper (Cu 99.9) were performed at temperatures ranging from 77 to 573 K and strain rates ranging from 10-3 to 5 × 103 1/s using an electronic universal testing machine and the split Hopkinson pressure bar system, respectively. We focused on the strain rate sensitivity and its dependence on experimental temperatures. The results show that UFG-Cu has enhanced strain rate sensitivity that is apparently temperature dependent. The activation volume of UFG-Cu is estimated to be on the order of ∼10b 3 at current experimental temperature and strain rate range. The plastic deformation mechanism is suggested to be dislocation-grain boundary interactions.",

keywords = "Activation volume, Dislocation-boundary interactions, Elevated temperature, High strain rate, Strain rate sensitivity, Ultra-fine grained copper",

author = "Tao Suo and Li, {Yu Long} and Kui Xie and Feng Zhao and Zhang, {Ke Shi} and Qiong Deng",

year = "2011",

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doi = "10.1016/j.mechmat.2011.02.002",

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T1 - Experimental investigation on strain rate sensitivity of ultra-fine grained copper at elevated temperatures

AU - Suo, Tao

AU - Li, Yu Long

AU - Xie, Kui

AU - Zhao, Feng

AU - Zhang, Ke Shi

AU - Deng, Qiong

PY - 2011/3

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N2 - Quasi-static and dynamic compression tests on ultra-fine grained (UFG) copper (Cu 99.9) were performed at temperatures ranging from 77 to 573 K and strain rates ranging from 10-3 to 5 × 103 1/s using an electronic universal testing machine and the split Hopkinson pressure bar system, respectively. We focused on the strain rate sensitivity and its dependence on experimental temperatures. The results show that UFG-Cu has enhanced strain rate sensitivity that is apparently temperature dependent. The activation volume of UFG-Cu is estimated to be on the order of ∼10b 3 at current experimental temperature and strain rate range. The plastic deformation mechanism is suggested to be dislocation-grain boundary interactions.

AB - Quasi-static and dynamic compression tests on ultra-fine grained (UFG) copper (Cu 99.9) were performed at temperatures ranging from 77 to 573 K and strain rates ranging from 10-3 to 5 × 103 1/s using an electronic universal testing machine and the split Hopkinson pressure bar system, respectively. We focused on the strain rate sensitivity and its dependence on experimental temperatures. The results show that UFG-Cu has enhanced strain rate sensitivity that is apparently temperature dependent. The activation volume of UFG-Cu is estimated to be on the order of ∼10b 3 at current experimental temperature and strain rate range. The plastic deformation mechanism is suggested to be dislocation-grain boundary interactions.

KW - Activation volume

KW - Dislocation-boundary interactions

KW - Elevated temperature

KW - High strain rate

KW - Strain rate sensitivity

KW - Ultra-fine grained copper

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Experimental investigation on strain rate sensitivity of ultra-fine grained copper at elevated temperatures

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