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 |
Microstructure and Mechanical Property Stability of Wire Arc Additive Manufactured Stainless Steels after Long-Term Thermal Aging |
Author(s) |
Juan F. Gonzalez, Luc Hagen, Stephen Tate, Jonah Klemm-Toole |
On-Site Speaker (Planned) |
Juan F. Gonzalez |
Abstract Scope |
Austenitic stainless steels are commonly used in power generation and other high-temperature structural applications that are subjected to elevated temperatures over long service lives. The replacement of these components often involves lengthy lead times resulting in power plant outages that are expensive and deteriorate the robustness of the energy infrastructure. Wire arc additive manufacturing (WAAM) has the potential to enable rapid manufacturing of new and replacement parts, but the long-term stability of microstructures and mechanical properties produced by WAAM are not well understood. In this presentation, we will discuss the influences of WAAM deposition parameters and post-build heat treatments on the precipitation of embrittling phases, such as sigma, in commercially available austenitic stainless steel wire feedstocks of 316L, 316LSi, 316H, and 16-8-2 after aging for up to 1000 hours at 650 °C. The implications of embrittling phases on tensile ductility after aging will be discussed. |