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首页> 外文期刊>Journal of Materials Engineering and Performance >Numerical Simulation of Residual Stress for Laser Welding of Ti-6Al-4V Alloy Considering Solid-State Phase Transformation
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Numerical Simulation of Residual Stress for Laser Welding of Ti-6Al-4V Alloy Considering Solid-State Phase Transformation

机译：用于考虑固态相变的Ti-6Al-4V合金激光焊接残留应力的数值模拟

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摘要

In the present work, a thermal-metallurgical-mechanical model which considered the influence of phase transformation was used to predict the residual stress field of Ti-6Al-4V after laser welding. In this model, the Johnson-Mehl-Avrami equation was used to predict diffusional solid-state phase transformations: alpha phase to beta phase during heating and beta phase to alpha phase during cooling. The Koistinen-Marburger equation was used to predict diffusionless solid-state phase transformation of beta phase to martensite during cooling. The properties of material were obtained using a mixing rule based on the phase fraction and the property of each pure phase. By applying this model, the effect of solid-state phase transformations of Ti-6Al-4V alloy on temperature field and stress field during laser welding was considered in the simulation. In addition, experiments were carried out for comparison, which significantly verified the accuracy of the applied model.
机译：在本作本作中，考虑相变影响的热冶金 - 机械模型用于预测激光焊接后Ti-6Al-4V的残余应力场。 在该模型中，Johnson-Mehl-Avrami方程用于预测在冷却期间加热和β相至α相期间对β相的扩散固态相变化：α相。 Koistinen-Marburger方程用于在冷却过程中预测β相对β相的扩散固态相变。 使用基于相位级分和每个纯相的性能的混合规则获得材料的性质。 通过应用该模型，在模拟中考虑了在模拟中考虑了Ti-6AL-4V合金对温度场和应力场的固态相变的影响。 此外，进行实验进行比较，这显着验证了应用模型的准确性。

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