Correlation between Flow Behavior and Microstructure Evolution during alpha/beta Deformation of TA19 Titanium Alloy
Correlation between Flow Behavior and Microstructure Evolution during alpha/beta Deformation of TA19 Titanium Alloy
复制标题
TA19钛合金α/β变形过程中流动行为与微观组织演变的相关性
DOI：
10.1002/adem.201600198
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发表时间：
2016
影响因子：
3.6
通讯作者：
Liu Q
中科院分区：
文献类型：
--
作者：
Wang Ke;Sun Dongliang;Wu Yanlin;Xin Renlong;Wu Mingyu;Liu Qing;Wang K;Liu Q
利用光学显微镜（OM）、扫描电镜（SEM）和透射电镜（TEM）研究了TA 19钛合金α/β变形过程中的流变行为。结果表明，随着变形温度的升高，应变速率敏感指数m和应变硬化指数n值增大。显微组织分析表明，β相含量的增加、晶粒细化、DRV和DRX有利于变形稳定性，使其值增大。DRV和DRX促进位错湮灭，使th-value减小。同时，在初生α相和β相同时发生的DRX使得900-980 °C区域的Q值远高于820-860 °C区域
The flow behavior during α/β deformation of TA19 titanium alloy is investigated by microstructure examination using an optical microscope (OM), a scanning electron microscope (SEM), and a transmission electron microscope (TEM). The results show that the strain rate sensitivity exponent (m) and strain hardening exponent (n) values increase with the increasing of deformation temperature. The microstructure examination reveals that the increasing of β phase content, grain refinement, DRV, and DRX benefit the deformation stability to make them‐value increase. The DRV and DRX promote the dislocation annihilation to make then‐value decrease. Meanwhile, the DRX occurring in both primary α and β phases makes the Q‐value in 900–980 °C region much higher than that in 820–860 °C region