The present work focuses on the simulation of the heat treatment applied after printing of Ti-6Al-4V parts. The numerical tool aims at predicting the influence of heat treatment conditions (e.g. holding time, temperature) on the residual stress field and the distortions for SLM produced parts. The numerical model relies on a thermo-viscoplastic constitutive model. To determine the corresponding material parameters, different creep tests have been performed at temperatures ranging from 723 K to 1173 K. According to the results, the stationary creep strain rate is independent of the hydrostatic pressure, which indicates that the high temperature behavior is not impacted by the initial porosity. Also, the material parameters are observed to change significantly from 873 K, which is due to the progressive transformation of the initial martensitic $\alpha \prime$ microstructure into the $\alpha +\beta$ lamellar microstructure. To validate the proposed approach, some numerical simulations have been performed for two different parts, for which distortions have been measured. The numerical and experimental distortions have then been compared to each other. For both parts, the agreement between experimental and numerical data is correct.

本工作着重于在印刷Ti-6Al-4V零件后进行的热处理模拟。数值工具旨在预测热处理条件（例如保持时间，温度）对残余应力场的影响以及SLM生产零件的变形。数值模型依赖于热粘塑性本构模型。为了确定相应的材料参数，已在723 K至1173 K的温度范围内执行了不同的蠕变测试。根据结果，静态蠕变应变速率与静水压力无关，这表明高温行为不受影响。由最初的孔隙率决定。同样，观察到材料参数从873 K起显着变化，这是由于初始马氏体的逐渐转变$\alpha \prime$ 微观结构 $\alpha +\beta$层状微结构。为了验证所提出的方法，已经对两个不同的部分进行了一些数值模拟，并对其进行了测量。然后将数值失真和实验失真相互比较。对于这两个部分，实验数据和数值数据之间的一致性是正确的。