About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Aging Response of Laser Powder Bed Fusion 17-4PH Stainless Steel |
Author(s) |
Evan Handler, Katherine Fowler, Aidan Cowhig, Caroline Vail |
On-Site Speaker (Planned) |
Katherine Fowler |
Abstract Scope |
Laser Powder Bed Fusion (LPBF) has garnered interest for its ability to create geometrically accurate, complex, and critical parts out of various metal powders. However, the process physics induce fast cooling rates and extensive reheating in the material, leading to microstructures that are noticeably different than those present in material manufactured using traditional methods. This issue is doubly significant as these unusual microstructures impede traditional transformation mechanisms that occur in traditionally manufactured material when undergoing standard heat treatment procedures. Naval Surface Warfare Center, Carderock Division studied the heat treatment response of the aging step 17-4PH stainless steel produced using LPBF across multiple systems, while holding the stress relief and solution treatment constant. Resultant material underwent tensile testing and microstructure was investigated optically. This presentation outlines the variations in characterization and performance when using a variety of heat treatment schemes in order to find an ideal method optimized for tensile performance. |