About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Effect of Direct Metal Laser Sintering Build Parameters on Defects and Ultrasonic Fatigue Performance of Additively Manufactured AlSi10Mg |
Author(s) |
Robert K. Rhein, Qianying Shi, Srinivasan Arjun Tekalur, J Wayne Jones, Jason W Carroll |
On-Site Speaker (Planned) |
Robert K. Rhein |
Abstract Scope |
The high cycle fatigue behavior 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 in turn are found to influence fatigue behavior, which is analyzed using the Murakami model. 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 behavior, representing Murakami dependence and a long crack regime are found to best correlate the fatigue life behavior. This information can be used to tailor defect size, type, and distribution to obtain necessary high cycle fatigue properties. |