Influence of thermomechanical processing on microstructure,mechanical and strain hardening properties of single-phase Mg-4Li-0.5Ca alloy for structural application  

作　　者：N.Sriraman S.Kumaran Sathiya Narayanan N 

机构地区：[1]School of Mechanical Engineering,SASTRA Deemed to be University Thirumalaisamudram,Thanjavur,Tamilnadu 613401,India [2]Department of Metallurgical and Materials Engineering,National Institute of Technology Tiruchirappalli,Tamil Nadu 620015,India

出　　处：《Journal of Magnesium and Alloys》2020年第4期1262-1268,共7页镁合金学报（英文）

摘　　要：The single-phase Mg-4Li-0.5Ca alloy was rolled at three different temperatures(250,300 and 350℃)and followed by annealing at 200°C for 10 min.To evaluate the mechanical properties,the tensile test was conducted at a constant strain rate of 10^(-3)s^(-1).Factors influencing the tensile strength and strain hardening properties were assessed by microscopy,XRD and EBSD analysis.Besides,Kocks-Mecking plots(K-M)were used to determine the different stages of strain hardening exhibited by the variously processed Mg-4Li-0.5Ca alloy test specimens.The ultimate tensile strength has decreased as hot-rolling temperature in creases with increased ductility.The strain hardening properties such as hardening capacity(Hc),strain hardening exponent(n)are increased significantly with an increase in hot rolling temperature and subsequent annealing.

关 键 词：Mg-4Li-0.5Ca Hot rolling TWINS Mg2Ca Hardening capacity 

分 类 号：TG146.22[一般工业技术—材料科学与工程]