About this Abstract |
Meeting |
MS&T22: 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 Surface Roughness on the Fatigue Behavior of Binder Jet Printed Ultra-fine 316L Austenitic Stainless Steel Powder |
Author(s) |
Mohammad Jamalkhani, Amir Mostafaei |
On-Site Speaker (Planned) |
Mohammad Jamalkhani |
Abstract Scope |
Binder jetting is an additive manufacturing method in which powder is deposited layer-by-layer and selectively joined in each layer with binder. Ultra-fine gas atomized 316L stainless steel powder is binder jetted followed by supersolidus liquid phase sintering at 1400 °C for 2 h. Micro-computed tomography observations show that though the density of the as-printed sample is ~54%, near full density of 99.4% is achieved with sintering at 1400 °C for 2 h. The objective of this research is to investigate fatigue life of as-sintered and surface treated binder jetted 316L SS samples. Surface topology analysis reveals trace number of open pores with an average surface roughness of 1.0 µm. Fatigue tests are performed under tension-compression condition at R=-1 with 20 Hz frequency. Fracture surface study is conducted on the fatigue samples to study the mechanism associated with crack initiation and propagation. |