Abstract In this study, Alloy 718 specimens manufactured by Electron Beam Powder Bed Fusion process are subjected to two different post-treatments to have different microstructural features. Low cycle fatigue testing has been performed both parallel and transverse to the build direction. EB-PBF Alloy 718 exhibits anisotropic fatigue behaviour; the fatigue life is better along the parallel direction compared to the transverse direction. The anisotropy in fatigue life is related to the anisotropy in the Young's modulus. The pseudo-elastic stress vs. fatigue life approach is presented as a potential solution to handle anisotropy in fatigue life assessment of additively manufactured engineering components.

中文翻译：

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Electron Beam Powder Bed Fusion制造718合金的各向异性疲劳性能

摘要 在本研究中，采用电子束粉末床融合工艺制造的 718 合金试样经过两种不同的后处理，具有不同的显微组织特征。低周疲劳测试已平行和横向于构建方向进行。EB-PBF 合金 718 表现出各向异性疲劳行为；与横向相比，平行方向的疲劳寿命更好。疲劳寿命的各向异性与杨氏模量的各向异性有关。伪弹性应力与疲劳寿命方法被提出作为处理增材制造工程部件疲劳寿命评估中的各向异性的潜在解决方案。