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] Shenyang Aerosp Univ, Coll Mat Sci & Engn, Shenyang 110136, Peoples R China
[2] Shenyang Ligong Univ, Sch Environm & Chem Engn, Shenyang 110159, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2020年 / 49卷 / 09期
基金：
国家高技术研究发展计划(863计划);
关键词：
Ti-6Al-4V alloy; water quenching; isothermal holding; the lamellar structure; hardness; TEXTURE EVOLUTION; TITANIUM-ALLOY; BEHAVIOR; DEFORMATION; TEMPERATURE; PARAMETERS; RESISTANCE; PHASE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
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 alpha' and alpha ''. The lamellar structure formed when the specimen was water-quenched after isothermal holding at 850 degrees C, and the hardness further increased. Colony appeared after deformation at 850 degrees C 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 a phase, lamellar colonies alpha/beta and colony when the specimen was isothermally held at 600 degrees C after deformation at 850 degrees C. Cooling and isothermal holding after deformation increased the width of a phase and colony, which was in the range of 324-706 nm for equiaxed grains. This caused a decrease in hardness.
引用
收藏
页码：3005 / 3011
页数：7
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