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题名: Microstructural evolution and enhanced superplasticity in friction stir processed Mg-Zn-Y-Zr alloy
作者: G. M. Xie;  Z. Y. Ma;  L. Geng;  R. S. Chen
发表日期: 2008
摘要: The extruded Mg-Zn-Y-Zr plate was subjected to friction stir processing (FSP). FSP resulted in significant breakup and dispersion of bulky W-phase particles and remarkable grain refinement, thereby substartially enhancing superplasticity. Maximum superplasticity of 635% was achieved at 450 degrees C and a relatively high strain rate of 3 x 10(-3) s(-1). By comparison, the as-extruded sample did not exhibit superplasticity. Grain boundary sliding was identified to be the primary deformation mechanism in the FSP Mg-Zn-Y-Zr by superplastic data analyses and surfacial morphology observations. Furthermore, the superplastic deformation kinetics of the FSP Mg-Zn-Y-Zr is significantly faster than that: of equal channel angular pressed (ECAP) magnesium alloys under both as-ECAP and annealing conditions.
KOS主题词: strain rate;  Superplasticity;  Mechanical properties;  Bauschinger effect;  Behavior;  phase;  Strabismus
刊名: Journal of Materials Research
相关网址: <Go to ISI>://WOS:000255543800004
Appears in Collections:中国科学院金属研究所_期刊论文

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Recommended Citation:
G. M. Xie,Z. Y. Ma,L. Geng,et al. Microstructural Evolution And Enhanced Superplasticity In Friction Stir Processed Mg-zn-y-zr Alloy[J]. Journal Of Materials Research,2008,23(5):1207-1213.

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