期刊
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
卷 43, 期 4, 页码 831-844出版社
WILEY
DOI: 10.1111/ffe.13200
关键词
additive manufacturing; crack-growth; FASTRAN; fatigue modelling; laser powder bed fusion
资金
- Mississippi State University's Center for Advanced Vehicular Systems (CAVS)
In this study, the crack-growth approach is used to predict the fatigue life of 17-4 precipitation hardening (PH) stainless steel (SS) fabricated via an additive manufacturing (AM) system in different orientations (ie, vertical and horizontal) before and after heat treatment. To perform fatigue-life calculations, the effective stress intensity factor as a function of crack-growth rate was obtained from testing modified compact specimens with different crack orientations in as-built and heat-treated conditions. The plasticity-induced crack closure model, FASTRAN, was used to calculate fatigue lives based on the size of process-induced defects. Results indicated that in the presence of large voids (ie, lack-of-fusion defects), the total fatigue life of AM 17-4 PH SS in as-built and heat-treated conditions is dominated by crack growth. Effect of build orientation on fatigue life of AM 17-4 PH SS was also captured based on the size of defects projected on a plane perpendicular to the loading direction.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据