|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing for Energy Applications IV
||Effective Sensitization Treatment for High-performance Steel Parts Made by Laser Powder Bed Fusion
||Mitra Shabani, Soumya Sridar, Robert Hoffman, Noah Sargent, Owen Hildreth, Wei Xiong
|On-Site Speaker (Planned)
Sensitization surface treatment can improve the tensile and fatigue properties among other mechanical properties of additively manufactured alloy parts. However, this technique leads to surface carburization, which may negatively impact the performance of steel parts. In this research, the temperature and duration needed for decarburization are predicted for sensitized surface-treated stainless steel 316L parts made by laser powder bed fusion using the CALPHAD approach. Sensitized and etched 316L samples are then heat-treated at the designed temperatures and further characterized using electron microscopy and microhardness to evaluate the effectiveness of the decarburization. Tensile tests and tension-tension fatigue tests at different maximum stress levels are then performed on as-printed, sensitized, and decarburized samples to study the effect of both sensitization surface treatment followed by optimized heat treatment. This study demonstrates a pathway to effectively integrate heat treatment and surface modification for the improved mechanical performance of additive manufacturing components.
||Additive Manufacturing, Characterization, Mechanical Properties