Simultaneously enhancing the ductility and strength of cryorolled Zr via tailoring dislocation configurations
Simultaneously enhancing the ductility and strength of cryorolled Zr via tailoring dislocation configurations
复制标题
通过定制位错配置同时增强冷冻轧制 Zr 的延展性和强度
DOI:
10.1016/j.msea.2012.08.061
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发表时间:
2012-12
期刊:
影响因子:
6.4
通讯作者:
Xiangyi Zhang
中科院分区:
文献类型:
--
作者:
Defeng Guo;Ming Li;Yindong Shi;Zhibo Zhang;Tengyun Ma;Haitian Zhang;Xiangyi Zhang
Dislocation configurations, e.g. dislocation tangles, cells and lamellas, in pure Zr have been tailored by cryorolling in the strain rate range of ε̇=0.59–2.24s−1, demonstrating a significant effect on mechanical properties. A simultaneous enhancement in the ductility and strength is obtained in the Zr cryorolled at ε̇=2.24s−1. The enhancement of ductility is due to the motion of preexisting dislocations under high tensile stress in dislocation lamella configurations yielded at the high strain rate, and the enhancement of strength results from the increase of dislocation density in the cryorolled Zr.
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