Microstructure and Mechanical Properties of Ultra-Fine Grain AZ80 Alloy Processed by Back Pressure Equal Channel Angular Pressing
Experiments were conducted on AZ80 magnesium alloy by using a procedure of back pressure equal-channel angular pressing (BP-ECAP) in order to achieve submicron grain size. Microstructure was effectively refined by BP-ECAP. The gain size was found around 100~500 nm after 4 passes using both route A and route Be at pressing temperatures of 200° C and 150 ℃. The grain size was much finer in comparison with the same alloy but received conventional procedure of ECAP without back pressure, which maintains around 2-3 urn after 8 passes at relatively high temperatures. Compression test results showed the yield strength increased with increasing applied pass. In addition, the samples processed using route A had a increasing of yield strength more obvious than that in samples processed using route Be. The highest yield strength from the sample pressed by route A at 150 ℃ was more than twice of the yield strength in the solution-treated and forged condition.
Nianxian Zhang Hua Ding Jizhong Li Xiaolin Wu Yinglong Li Kenong Xia
School of Materials and Metallurgy Northeastern University,Shenyang,Liaoning 110004,China Department of Mechanical Engineering University of Melbourne,Victoria 3010,Australia
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
547-552
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）