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HomeMaterials Science ForumMaterials Science Forum Vol. 817High-Strain-Rate Response of a Specially-Made...

High-Strain-Rate Response of a Specially-Made Copper Sample

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Abstract:

In the present study, a systematic study on both the high strain-rate tensile and compressive deformation behaviors of a specially-made copper sample have been carried out at different high temperatures, by using the split Hopkinson bar experiments. The Johnson-Cook constitutive model was used to model the high strain-rate responses of the specimen at high temperatures. The results showed that compared with other metallic materials, the specially-made copper sample had a relatively stronger strain-rate-hardening effect and weaker temperature-softening effect. Evolution of the microstructure suggests that under high strain-rate, both the dislocation slip and deformation twins contribute to the plastic strengthening of the copper specimen, resulting in the strain-rate-hardening effect. And the dynamic recrystallization behavior plays an important role during the high strain-rate deformation process at the high temperatures.

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Basic Research of Materials

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Periodical:

Materials Science Forum (Volume 817)

Pages:

35-41

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.817.35

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Online since:

April 2015

Authors:

Dong Mei Liu*, Qiang Song Wang, Guo Liang Xie, Wei Bin Xie, Yang Li, Xue Cheng Gao

Keywords:

Copper, Dynamic Recrystallization, High Strain-Rate Deformation, Strain-Rate-Hardening, Temperature-Softening

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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