Microstructure and Mechanical Properties of an AZ31 Magnesium Alloy Processed by Accumulative Back Extrusion (ABE)
A new continuous severe plastic deformation (SPD) method called accumulative back extrusion (ABE) was employed to fabricate ultra-fine grained AZ31 Mg alloy. Microstructures of AZ31 alloy processed by ABE up to four passes at a temperature of 230 ℃ were investigated using field emission scanning electron microscopy (FESEM). The results showed that the initial average grain size of 25 um was reduced to about 1 urn It was also found out that the more passes gave more homogenous microstructure. In addition, in order to find the effect of grain size on the mechanical properties, microtension tests were carried out and the changes in the yield and tensile strength and fracture elongation were analyzed. The obtained tensile properties were discussed relying on the characteristics of as-processed microstructures.
Mahmood Fatemi-Varzaneh Jose Maria Cabrera Abbas Zarei-Hanzaki
School of Metallurgical & Materials Engineering,University of Tehran,Iran Department of Metallurgical & Materials Engineering,ETSEIB,Universidad Politecnica de Catalunya,Diag Fundaci6n CTM ,Av.Bases de Manresa 1,08242,Manresa,Spain
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
1033-1038
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）