Anisotropy in dynamic recrystallization behavior of AZ31 magnesium alloy

作     者：S.M.Fatemi S.Kheyrabadi H.Paul 

作者机构：Department of Metallurgy and Materials EngineeringShahid Rajaee Teacher Training University136-16785 TehranIran Institute of Metallurgy and Materials SciencePolish Academy of Sciences(PAS)25 Reymonta Street30-059 KrakowPoland 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2022年第10卷第12期

页      面：3470-3484页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported in part by the National Science Center (Poland) under grant No. 2018/31/B/ST8/00942 

主　　题：Slip Recrystallization Grain size Growth Twin 

摘      要：Deformation behavior as well as microstructural evolutions of a rolled AZ31 magnesium alloy with and without pre-existing extension twins were studied using compression tests which performed along different orientations at a temperature range of 25–350 ℃. The results implied that the initial texture not only influence the evolution of flow stress, but also change the size and fraction of recrystallized *** contrast to samples parallel to rolling and transverse directions, compression along normal direction resulted in a respectful softening at 150 ℃. The largest size and fraction of new grains at 250 ℃ were recorded after deformation along rolling direction, while the maximum flow softening was observed during deformation along normal direction. The anisotropy in microstructural evolutions was still retained at 350 ℃. Pre-existing twins could reduce the anisotropy of material in respect of flow stress as well as DRX progression, where TD sample showed the lowest DRX fraction at 250 ℃. Quaternion misorientation data obtained from EBSD analysis of pretwinned material implied that initial texture could not significantly influence final texture. A different misorientation distribution was realized after deformation of pretwinned material along ND and RD directions.