Dynamic Electropulsing Induced Phase Transformations and Their Effects on Single Point Diamond Turning of AZ91 Alloy

• 作者: Duo Zhang Guoyi Tang Hao Wang S. To Yaohua Zhu
• 来源期刊: 表面工程材料与先进技术期刊(英文)
• 学科: 工学
• 关键词: ELECTROPULSING PHASE TRANSFORMATIONS DISLOCATION TWINS MAGNESIUM Alloy
• 年，卷（期）: bmgcclyxjjsqkyw_2012,（1）
• 页码范围: 16-21
• 页数: 6页
• 分类号: TG14

摘要

The effects of dynamic electropulsing on microstructure changes and phase transformations of a rolled Mg-9Al-1Zn alloy were studied by using optical microscopy, X-ray diffraction, back-scattered scanning microscopy and transmission electron microscopy techniques. The decomposition of β phase was accelerated under dynamic electropulsing, compared with the conventional thermal processes. Dynamic electropulsing was less effective in affecting the phase transformations, but more effective in reducing residual stress than the static electropulsing. Dynamic electropulsing improved machinability of single point diamond turning, the mechanism of which is discussed from the point of view of dislocation dynamics.