Influence of different high pressure die casting processes on 3D porosity distribution of Mg-3.0Nd-0.3Zn-0.6Zr alloy

作     者：Yi-hu Ma Wen-bo Yu Yu-qi Zhou Shou-mei Xiong Yi-hu Ma;Wen-bo Yu;Yu-qi Zhou;Shou-mei Xiong

作者机构：Center of Materials Science and EngineeringSchool of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2021年第18卷第6期

页      面：521-528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：financially supported by the National Training Programs of Innovation and Entrepreneurship for Undergraduates and the State Key Lab of Advanced Metals and Materials(No.2021-ZD08) the National Natural Science Foundation of China(No.52175284) 

主　　题：HPDC parameters porosity volume 3D morphology 

摘      要：3D reconstruction was adopted to characterize the microstructural morphologies of Mg-3.0Nd-0.3Zn-0.6Zr alloy castings produced by high pressure die casting(HPDC)processes with different parameters,including low slow-shot speed,solidification pressurization and fast slow-shot *** low slow-shot speeds of 0.1 m·s^(-1),0.2 m·s^(-1) and 0.3 m·s^(-1),the porosity is concentrated in the center of the castings with one spiral staggered shape along the liquid flow *** porosity volume simultaneously decreases with the reduction of quantity and size of externally solidified crystals(ESCs),while the shrinkage pores become more and more dispersed with the increasing low slow-shot *** not only reduces the porosity volume due to the improvement of feeding ability,but also transformes the center gathered porosity into one layer-by-layer distribution *** with the increasing fast slow-shot speed,the central porosity dramatically decreases and transforms into a large-scale spiral staggered shape along the liquid flow ***,the porosity is much more dispersed when the speed is increased from 2 m·s^(-1) to 3 m·s^(-1).