About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
High Cycle Fatigue Properties of Laser Metal Deposited Waspaloy |
Author(s) |
Romain Bordas, Jonathan Cormier, Patrick Villechaise, Azdine Nait-Ali, André Malié, Alice Cervellon, Roland Fortunier |
On-Site Speaker (Planned) |
Romain Bordas |
Abstract Scope |
Two different sets of manufacturing parameters were tested to produce two batches of LMD-processed Waspaloy specimens : one with a significant amount of porosity and another with a low amount. Then, HCF tests were performed at 700 °C, 80 Hz and with a stress ratio of 0.05, the maximum applied stress ranging from 50 % to 90 % of the Yield Stress. One single trend has been identified from the S-N diagram regardless of the porosity characteristics. However, two types of crack initiation mechanism have been observed: crack initiation at large sub-surface pores inherited from the LMD process and crack initiation with a crystallographic facet. In both cases, a crystallographic crack propagation from the crack initiation site has been observed whatever the localisation and nature of the initiation site. In this presentation, a special focus will be paid to the first stage of crack propagation from the critical sites. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |