The additive manufacturing benchmarking challenge described in this work was aimed at the prediction of average stress–strain properties for tensile specimens that were excised from blocks of non-heat-treated IN625 manufactured by laser powder bed fusion. Two different laser scan strategies were considered: an X-only raster and an XY raster, which involved a 90\(^\circ \) rotation in the scan direction between subsequent layers. To measure anisotropy, multiple tensile orientations with respect to the build direction were investigated (e.g., parallel, perpendicular, and intervals in between). Benchmark participants were provided grain structure information via electron backscatter diffraction measurements, as well as the stress–strain response for tensile specimens manufactured parallel to the build direction and produced by the XY scan strategy. Then, participants were asked to predict tensile properties, like the ultimate tensile strength, for the remaining specimens and orientations. Interestingly, the measured mechanical properties did not vary linearly as a function of tensile orientation. Moreover, specimens manufactured with the XY scan strategy exhibited greater yield strength than those corresponding to the X-only scan strategy, regardless of orientation. The benchmark data have been made publicly available for anyone that is interested [1]. For the modeling aspect of the challenge, five teams participated in this benchmark. While most of the models incorporated a crystal plasticity framework, one team chose to use a more semiempirical approach and to great success. However, no team excelled at all the predictions, and all teams were seemingly challenged with the predictions associated with the X-only scan strategy.

这项工作中描述的增材制造基准测试挑战旨在预测从激光粉末床熔合制造的非热处理 IN625 块上切下的拉伸样本的平均应力-应变特性。考虑了两种不同的激光扫描策略：仅 X 光栅和 XY 光栅，其中涉及后续层之间扫描方向上的90 \(^\circ \)旋转。为了测量各向异性，研究了相对于构建方向的多个拉伸方向（例如，平行、垂直和其间的间隔）。基准测试参与者通过电子背散射衍射测量获得晶粒结构信息，以及平行于构建方向制造并通过 XY 扫描策略产生的拉伸样本的应力-应变响应。然后，参与者被要求预测剩余样本和方向的拉伸性能，例如极限拉伸强度。有趣的是，测量的机械性能并不随拉伸取向线性变化。此外，无论方向如何，采用 ​​XY 扫描策略制造的样本均表现出比仅 X 扫描策略对应的样本更高的屈服强度。基准数据已向任何感兴趣的人公开 [1]。对于挑战的建模方面，有五个团队参与了该基准测试。虽然大多数模型都采用了晶体可塑性框架，但一个团队选择使用更半经验的方法并取得了巨大成功。然而，没有一个团队在所有预测上都表现出色，而且所有团队似乎都受到与仅 X 扫描策略相关的预测的挑战。