表面技术Issue(4)：32-36,5.
机械研磨处理 AZ91D 镁合金表面晶粒细化研究
Investigation of Surface Grain Refinement of AZ91D Magnesium Alloys by Surface Mechanical Attrition Treatment
摘要
Abstract
Objective To study the grain refinement behavior and mechanism of AZ91D magnesium alloys after surface mechan-ical attrition treatment. Methods The AZ91D magnesium alloy in hexagonal-closet-packet structure was treated by surface mechani-cal attrition treatment (SMAT). And the microstructure of surface deformed layer was characterized. Results After 60 min of SMAT, the depth of deformed surface layer was about 80 μm, the structure of which showed a gradient distribution, and the grains became larger with increasing distance from surface, and the surface grain size reached about 20 nm. Conclusion The grain of AZ91D magnesium alloys was obviously refined by surface mechanical attrition treatment; the grain refinement mechanism of AZ91D magnesium alloy by surface mechanical attrition treatment was the results of twinning and dislocation slip.关键词
AZ91D 镁合金/表面机械研磨/晶粒细化Key words
AZ91D magnesium alloys/surface mechanical attrition/grain refinement分类
矿业与冶金引用本文复制引用
韩宝军,何琼,杨妙..机械研磨处理 AZ91D 镁合金表面晶粒细化研究[J].表面技术,2014,(4):32-36,5.基金项目
教育部科技重点项目(212093) （212093）
江西省自然科学基金项目(20114BAB216013)Fund：Supported by the Key Science and Technology Project of Ministry of Education (212093) （20114BAB216013）
Natural Science Foundation Project of Jiangxi Province (20114BAB216013) （20114BAB216013）
