Fatigue behaviour of additively manufactured AlSi10Mg and 17-4 PH SS cylindrical notched specimens: The effect of volumetric defects

被引：1
作者：
Poudel, Arun [1 ,2 ]
Pegues, Jonathan [1 ,2 ]
Kelly, Matthew [3 ]
Shao, Shuai [1 ,2 ]
Shamsaei, Nima [1 ,2 ]
机构：
[1] Auburn Univ, Natl Ctr Addit Mfg Excellence NCAME, Auburn, AL 36849 USA
[2] Auburn Univ, Dept Mech Engn, Auburn, AL 36849 USA
[3] US Army DEVCOM Ground Vehicles Syst Ctr GVSC, Warren, MI 48092 USA
来源：
ENGINEERING FAILURE ANALYSIS | 2025年 / 175卷
基金：
美国国家科学基金会;
关键词：
Laser powder bed fusion (L-PBF/LB-PBF); Notch fatigue behavior; Defect criticality; AlSi10Mg; 17-4 PH SS; HIGH-CYCLE FATIGUE; MECHANICAL-BEHAVIOR; LASER; RESISTANCE; TI-6AL-4V; STRENGTH; ADVANTAGES; GROWTH;
D O I：
10.1016/j.engfailanal.2025.109602
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This study investigated the synergistic effects of volumetric defects and notch geometry on the fatigue behavior of laser powder bed fused AlSi10Mg and 17-4 precipitation hardening (PH) stainless steel (SS) cylindrical notched specimens. Among the considered notch root radii, rho, of 0.1, 5, and 50 mm, 0.1 mm showed the shortest fatigue lives. All fatigue cracks initiated from the notch root for rho 0.1 mm and from volumetric defects or turning grooves for rho 5 mm and 50 mm specimens. The mode-I stress intensity factor, taking into account the synergistic influence of notch geometry, defects' size, and location, was found to correlate well with experimental fatigue lives of AlSi10Mg and 17-4 PH SS notched specimens.
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页数：18
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