Effect of forging temperature on the microstructure,subsequent aging precipitation behavior,and mechanical properties of Mg-Gd-Y-Zr-Ag alloy
作者机构：School of Materials Science and EngineeringCentral South UniversityChangsha 410083China Light Alloy Research InstituteCentral South UniversityChangsha 410083China Hunan Meiyu Technology Co.Ltd.Yueyang 414000China
出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)
年 卷 期：2024年第181卷第14期
页 面：41-57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 by the National Key R&D Program of China(No.2021YFB3701100)
主 题：Mg-Gd-Y-Zr-Ag alloy Multidirectional forging Deformation mechanism Aging behavior high strength
摘 要：The deformation mechanism,microstructure evolution,and precipitation behavior of a Mg-8.9Gd-1.8Y-0.5Zr-0.2Ag(wt.%)alloy multi-directionally forged at three different temperatures were *** the forging temperature increases,the particle-stimulated nucleation(PSN)effect diminishes as the num-ber of dynamic precipitates decreases,pyramidal slip is activated,grain boundary migration accelerates,and continuous dynamic recrystallization(CDRX)*** microstructures varied greatly,although fine-grained structures were formed at all different forging *** precipitation be-tween dynamic precipitate growth,dislocation-induced precipitation,and homogeneous precipitation was observed after aging *** them,the medium temperature(748 K)forged and aged alloy ex-hibits the best mechanical performance,with an ultimate tensile strength of 436 MPa,and elongation of 16.3%.The calculation indicates that the mixed precipitation structure containing theβprecipitate band provides a 35%higher strengthening contribution than the typical homogeneously distributed *** formation of precipitation-free zones(PFZs)ensures that aging will not cause a dramatic de-crease in ductility,which provides a reference for the industrial preparation of high-performance wrought Mg-Gd series alloys.
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