|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Friction Stir Welding and Processing IX
||Effect of Thermal Aging on the Corrosion and Mechanical Properties of Friction Stir Welded 250 Grade Maraging Steel
||Todd Curtis, Bharat Jasthi, Christian Widener, Michael West, Brendon Kellogg
|On-Site Speaker (Planned)
The main objective of this work is to investigate the microstructure and mechanical properties of friction stir welded 250 grade Maraging steel. Successful welds were made using W-25%Re-4%HfC pin tools in forge control mode at a rotational speed of 200 RPM and a travel speed of 2 IPM. The effects of post weld aging on the mechanical properties of the welds were evaluated. Post-weld aging was performed at 800°F, 900°F and 1000°F for 1h, 5h and 15h and the mechanical properties were evaluated and compared to the parent material. Microstructural characterization was performed using optical and electron microscopy. Post-weld aging at 900°F for 15h resulted in uniform microhardness across the weld nugget and also resulted in optimized mechanical properties of the welded joints.
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