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Warm deformation and strain-hardening behaviors of fine-grained ZK60 alloy sheet

Tensile flow behaviors of the fine-grained ZK60 alloy sheet are investigated from 298 K to 523 K with strain rates from 10−1 s−1 to 10−3 s−1. The apparent activation energy tested at 523 K is estimated to be 103 kJ mol−1, indicating that grain-boundary sliding (GBS) associated with grain boundary di...

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Bibliographic Details
Published in:Materials research express 2019-11, Vol.6 (12), p.126528
Main Authors: Yi, Lei, Weijun, Xia, Hongge, Yan, Jihua, Chen, Bin, Su, Tian, Ding, Lu, Zhao, Qin, Wu
Format: Article
Language:English
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Summary:Tensile flow behaviors of the fine-grained ZK60 alloy sheet are investigated from 298 K to 523 K with strain rates from 10−1 s−1 to 10−3 s−1. The apparent activation energy tested at 523 K is estimated to be 103 kJ mol−1, indicating that grain-boundary sliding (GBS) associated with grain boundary diffusion is the dominant deformation mechanism of the fine-grained ZK60 alloy. The effects of deformation temperature and strain rate on the strain-hardening and strain-softening behaviors are analyzed by the K-M approach. The results show that the dislocation proliferation contributes to the hardening process but DRX play an important role in the softening process.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/ab3ed5