Method for evaluating stress cracking resistance of metal 3D printing material

The invention relates to a method for evaluating stress cracking resistance of a metal 3D printing material, and belongs to the technical field of 3D printing. The invention provides a method for evaluating the stress cracking resistance of a metal 3D printing material, a series of metal 3D printing models are designed and printed by applying the method, the factors for model change are three shape factors sensitive to stress, namely, a part sharp angle alpha 1, a part bottom plane included angle alpha 2 and an R angle between a sample and a bottom plane, the non-cracking design boundary of the material in the printing process is searched by printing a series of models, and the stress cracking resistance of the materials is compared by adopting the same model for different materials. 本发明涉及一种用于评估金属3D打印材料抗应力开裂性能的方法，属于3D打印技术领域。本发明提供一种用于评估金属3D打印材料抗应力开裂性能的方法，并应用该方法设计并打印金属3D打印的系列模型，模型变更的因素为三种对应力敏感的形状因素，分别为零件尖角∠α1、零件底平面夹角∠α2、样品与底平面的R角，通过打印系列模型来寻找该材料在打印过程中不开裂的设计边界，且针对不同材料采用相同模型来对比材料的抗应力开裂能力。