材料科学
等温过程
钛合金
相(物质)
联轴节(管道)
应变率
变形(气象学)
合金
烫印
冶金
转化(遗传学)
扩散
等温转变图
复合材料
热力学
微观结构
贝氏体
生物化学
化学
物理
有机化学
基因
奥氏体
作者
Yuan Chen,Shuhui Li,Yanze Li,Yaoqi Wang,Zhiqiang Li,Zhongqin Lin
标识
DOI:10.1016/j.jmrt.2021.03.013
摘要
The simultaneous occurrence of phase transformation and deformation for titanium alloy sheets is an important feature in hot stamping process where components are formed in room-temperature tools by hot blanks. This work takes a research on the constitutive modeling of TA15 alloy by coupling the effect of phase transformation under hot stamping conditions. Based on Gleeble testing system, the continuous cooling tests and interrupted tensile tests are conducted to study the effects of cooling rate and deformation on phase transformation. Subsequently, a diffusion controlled phase transformation model is extended to describe the phase transformation kinetics. The flow behaviors of TA15 alloy are found to be not only sensitive to temperature and strain rate, but also cooling rate dependent, which can be ascribed to the phase transformation. Hence, a physically based model coupling the effect of phase transformation is proposed. Compared with experimental stress–strain values, the average relative error of predicted results by the proposed model is 2.29%. Finally, hot stamping simulations and experiments of a U-shape part are performed. The simulation results of the proposed model show a better agreement with the experiments.
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