Influence of Ca addition on the dynamic and static recrystallization behavior of direct extruded flat profiles of Mg-Y-Zn alloy  

作　　者：Maria Nienaber Jan Bohlen Sangbong Yi Gerrit Kurz Karl Ulrich Kainer Dietmar Letzig 

机构地区：[1]Institute of Material and Process Design,Helmholtz-Zentrum Hereon GmbH,Max-Planck-Str.1,Geesthacht 21502,Germany [2]Agnes-Miegel,Str.11,Bad Essen 49152,Germany

出　　处：《Journal of Magnesium and Alloys》2023年第10期3736-3748,共13页镁合金学报（英文）

摘　　要：This paper investigates the influence of addition of Ca in a Y-Zn-containing magnesium alloy on the dynamic and static recrystallization behaviors and reveals the formation mechanism of the quadrupole texture during thermomechanical processing. Direct extrusion of flat bands has been conducted at various process conditions to study the difference between the two alloys WZ10 and WZX100 in terms of microstructure and texture development. It can be shown that, Ca addition promotes the DRX of WZ10 alloy. During additional heat treatment,the absence of Y segregation at the grain boundaries and the associated lack of solute drag to the boundary mobility leads to a pronounced grain growth during SRX in WZX100 alloy. Furthermore, it is shown that the addition of Ca to Y-Zn is not beneficial in terms of formability.It is demonstrated that alloying elements can have different effects depending on the recrystallization mechanisms. Partially recrystallized microstructure is a prerequisite at the as-extruded status to form the quadrupole texture and during subsequent annealing, which stands for high formability.

关 键 词：Extrusion RECRYSTALLIZATION Magnesium alloy Mg-Y-Zn-Ca alloy FORMABILITY quadrupole texture 

分 类 号：TG146.22[一般工业技术—材料科学与工程]