Microstructure and Mechanical Properties of AZ81 Magnesium Alloy after Unequal Channel Angular Pressing

摘要：

　　The microstructure and mechanical properties of AZ81magnesium alloys after unequal channel angular pressing (UCAP) was investigated using self-made 90°die under different temperature.The results showed that under the same pressing speed,there was a better grain refinement and mechanical property improvement with the decreasing of pressing temperature,however,the tiny cracks on the surface of the processed samples increased.When squeezed at 250 ℃,the average grain was refined from the initial 150um to10um.The tensile strength was changed to 350Mpa,and the elongation was of 10%.Tensile fractures presented the increment of dimples structure,which was the result of refined α-Mg matrix and intermetallic compound β-Mg17Al12 phase by severe shear and plastic deformation at high temperature press.

关键词： Unequal channeI angular pressing AZ81 Magnesium aIIoy

作者: Xiaoping Luo Mingang Zhang Junqi Zhou

作者单位: Taiyuan University of Science and Technology, Taiyuan 030024,China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 343-348

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）