This study introduces a microstructure-sensitive fatigue life prediction framework based on CP-FFT which includes the effect of surface roughness. The model is applied to flat Hastelloy-X specimens fabricated using Selective Laser Melting. The surface roughness measured is incorporated introducing a free surface with sinusoidal profile. The framework can accurately predict the fatigue life reduction of rough flat specimens using the fatigue parameters of polished bulk specimens and introducing the actual microstructure and roughness. A parametric study shows a monotonic reduction of life with the roughness amplitude but a minor effect of the surface waviness.

中文翻译：

---

考虑表面粗糙度和微观结构综合影响的疲劳寿命模型：应用于 SLM 制造的 Hastelloy-X

本研究介绍了基于 CP-FFT 的微观结构敏感疲劳寿命预测框架，其中包括表面粗糙度的影响。该模型适用于使用选择性激光熔化制造的扁平 Hastelloy-X 样品。测量的表面粗糙度被纳入引入具有正弦轮廓的自由表面。该框架可以利用抛光块状试样的疲劳参数并引入实际的微观结构和粗糙度来准确预测粗糙扁平试样的疲劳寿命缩短。参数研究表明，寿命随着粗糙度幅度的增加而单调减少，但表面波纹度的影响较小。