Single track scanning is a widely used method to evaluate the effects of rapid solidification of metals and to analyze their printability. Microstructure level stresses play a dominant role in causing material failure during deposition or poor performance on the finished product. This work formulates a thermomechanical crystal plasticity model capable of presenting microscale level evolution and residual state of stresses and strains in a single track event of selective laser melting. The present novel thermomechanical model is a vital piece of an overall workflow to analyze material properties and more complex performance inherent and dependent on the microstructure scale phenomena. The results show effectiveness of the model in addressing microscale residual stress heterogeneities dependent on the melt pool area thermal and microstructural evolution, including micromechanical phase transformations, and their interaction with the surrounding matrix on the studied H13 tool steel. The method is found exceptionally robust in terms of predicting microstructural residual stresses and deformation, while its greatest limiting feature is the requirement of prior solidified microstructure as an input for the computations.

单迹线扫描是一种广泛使用的方法，用于评估金属的快速凝固效果并分析其可印刷性。微观结构应力在导致沉积过程中材料失效或最终产品性能不佳方面起主要作用。这项工作制定了一个热机械晶体可塑性模型，该模型能够在选择性激光熔化的单轨事件中呈现微观尺度的演化以及应力和应变的残余状态。本新颖的热力学模型是整个工作流程中至关重要的部分，可用于分析固有的并取决于微观结构尺度现象的材料特性和更复杂的性能。结果表明，该模型在解决微观残余应力异质性方面的有效性，该异质性取决于熔池区域的热和微观结构演化，包括微机械相变以及它们与研究的H13工具钢上与周围基体的相互作用。发现该方法在预测微结构残余应力和变形方面异常强大，而其最大的限制功能是需要事先固化的微结构作为计算的输入。