Microstructural Evolution of Ti-6Al-4V Alloy During Water Quenching Under Different Processing Conditions

被引：0
|
作者：
Zhang, Runqi [1 ]
Cai, Yiqin [1 ]
Li, Zhuang [1 ]
Li, Jinyu [1 ]
Zhou, Qi [2 ]
Cui, Xijun [1 ]
机构：
[1] College of Materials Science and Engineering, Shenyang Aerospace University, Shenyang,110136, China
[2] School of Environment and Chemical Engineering, Shenyang Ligong University, Shenyang,110159, China
来源：
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | 2020年 / 49卷 / 09期
关键词：
Aluminum alloys;
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摘要：
It is important to understand the microstructural evolution of Ti-6Al-4V alloy during water quenching under different processing parameters in order to obtain optimum mechanical properties of the alloy. The thermal simulation of Ti-6Al-4V alloy was conducted using a thermomechanical simulator. The results have shown that a fully martensitic microstructure was obtained after solution treatment. Water-quenching after solution resulted in hardness increase, and this was attributed to the presence of α' and α″. The lamellar structure formed when the specimen was water-quenched after isothermal holding at 850℃, and the hardness further increased. Colony appeared after deformation at 850℃ with subsequent water quenching, and the Vickers hardness HV reached the maximum value (5840 MPa) because of the grain boundary strengthening. The microstructure was composed of α phase, lamellar colonies α/β and colony when the specimen was isothermally held at 600℃ after deformation at 850℃. Cooling and isothermal holding after deformation increased the width of α phase and colony, which was in the range of 324~706 nm for equiaxed grains. This caused a decrease in hardness. Copyright © 2020, Northwest Institute for Nonferrous Metal Research. Published by Science Press. All rights reserved.
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页码：3005 / 3011
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