Effect of solution treatment on microstructure and hardness of rheo-forming AZ91-Y alloy  

作　　者：Zhi-wei Wang Hong Yan Wen-xian Huang 

机构地区：[1]Department of Materials Processing Engineering,School of Mechanical Electrical Engineering,Nanchang University,Nanchang 330031,China [2]Key Laboratory of Light Alloy Preparation&Processing,Nanchang 330031,China [3]Department of Civil Engineering,School of Architectural Engineering,Jinggangshan University,Ji'an 343009,China

出　　处：《China Foundry》2016年第6期383-388,共6页中国铸造(英文版)

基　　金：financially supported by the National Science Foundation of China(51165032);Ministry of Education Special Research Fund of the Doctoral Program for Higher Education(20133601110001);Innovative Group of Science and Technology of College of Jiangxi Province(00008713);the Production,Teaching and Research Cooperation Plan of Nanchang Non-party Experts and Doctors(2012-CYH-DW-XCL-002)

摘　　要：The microstructure and hardness of rheo-forming AZ91-Y alloy before and after solution treatment(ST)have been investigated by means of optical microscope(OM),scanning electron microscope(SEM)equipped with energy dispersive spectroscopy(EDS),X-ray diffraction(XRD)and Vickers.The experimental results showed that theβ-Mg17Al12 phase of alloy was nearly dissolved after ST for 5 min.With the increasing of ST duration to 28 h,both the primary and secondarily solidifiedα-Mg grains faded away.At the same time,the alloy exhibited a much smoother surface due to the diffusion of solute atoms(Al).During ST,the thermal stable phase of Al2 Y produced by ultrasonic vibration retained its size and morphology.As the ST duration was increased,the alloy hardness decreased sharply at first,and then gradually reached a minimum level.The alloy's appropriate ST duration at 410°C was approximately 28 h.

关 键 词：AZ91 alloy rheo-forming rare earth solution treatment HARDNESS 

分 类 号：TG146.22[一般工业技术—材料科学与工程]