Effect of T6 Heat Treatment on Microstructure and Properties of AZ91D and AZ91D-1.5%Y Magnesium Alloys in Lost Foam Casting
Author of the article:LIN Xuexiong;ZONG Xiaoming;GAO Fei
Author's Workplace：Aerospace Life-support Industries,'Co.,Ltd.,Xiangyang 441003,China;Luoyang Bearing Research Institute Co.,Ltd., Luoyang 471039,China
Key Words：AZ91D Y lost foam casting microstructure mechanical property
Abstract：
In lost foam casting AZ91 D magnesium alloy AZ91D-1.5% Y and as the research object, using the optical microscope(OM), scanning electron microscope(SEM), X-ray diffraction(XRD), X-ray spectrometer(EDS), and metal tensile and hardness test system to study the lost foam casting AZ91 D magnesium alloy AZ91D-1.5%Y and β-Mg17Al12 phase in the process of T6 heat treatment of dissolution and precipitation of the influence of the structure and mechanical properties. The results show that the T6(250 ℃ 420 ℃ solution 20 h, aging) process, along with the aging time, the hardness and tensile strength of AZ91 D magnesium alloy AZ91D-1.5%Y will be increasing;When the aging time is 15 h,the hardness and tensile strength reach the maximum, and the hardness and tensile strength of AZ91D-1.5%Y magnesium alloy after solid solution treatment are higher than AZ91 D magnesium alloy.
