|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Beyond the Beam III
||Microstructure and mechanical properties of friction stir deposited SS304
||Nikhil Gotawala, Neeraj Kumar Mishra, Amber Shrivastava
|On-Site Speaker (Planned)
The objective of this work is to analyse the microstructure and its effect on mechanical properties of friction stir deposited SS304. Friction stir deposition is a solid state additive manufacturing technique, where the material does not melt during the process. This process has shown potential for applications like large scale repairing of steel infrastructure. In this work, friction stir deposition of SS304 is performed at 2000 rpm rotation speed, 1.5 mm/s plunge feed rate and 4 mm/s forward feed rate. The results suggest that a layer of 0.3 mm to 0.4 mm is deposited per pass. The dynamic recrystallization occurred during friction stir deposition, which led to refined microstructure in the deposited region. A bimodal microstructure is observed in the deposited region, with finer grains near the interface of the successive layers. The tensile testing results show that the refinement of microstructure in the deposited region enhances the tensile strength.