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Effect of direct metal laser sintering build parameters on defects and ultrasonic fatigue performance of additively manufactured AlSi10Mg
Author(s) -
Rhein Robert K.,
Shi Qianying,
Arjun Tekalur Srinivasan,
Wayne Jones J.,
Carroll Jason W.
Publication year - 2021
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13355
Subject(s) - materials science , context (archaeology) , ultrasonic sensor , fatigue limit , fatigue testing , stress (linguistics) , structural engineering , composite material , engineering , acoustics , paleontology , linguistics , philosophy , physics , biology
The high cycle fatigue behaviour of additively manufactured AlSi10Mg is evaluated using ultrasonic fatigue as a means to accelerate fatigue testing. Build parameters during the additive manufacturing process are varied, and their effect on defect type, size, and distribution is determined. These defects are further found to influence fatigue behaviour, which is analysed using a Murakamia r e amodel. Finally, the ultrasonic fatigue test results are interpreted in the context of applied stress intensity factor and an optimized fatigue limit fit. Two different kinds of physical behaviour, representing Murakami dependence and a long crack regime, are found to better correlate the fatigue life behaviour than the Murakami model alone. With this information, we can tailor defect size, type and distribution, within the context of an optimized processing route, to obtain necessary high cycle fatigue properties.