Microstructural and mechanical properties characterization of wire arc additive manufacturing with GMAW for 308 stainless steel

Alami, Muhamad Fakhrur Razi (2024) Microstructural and mechanical properties characterization of wire arc additive manufacturing with GMAW for 308 stainless steel. Project Report. Melaka, Malaysia, Universiti Teknikal Malaysia Melaka. (Submitted)

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Abstract

This research is focused on characterizing the microstructure and mechanical properties of 308 stainless steel fabricated by Wire Arc Additive Manufacturing using Gas Metal Arc Welding. The samples produced in this research were deposited using an EWM GMAW system controlled by a KUKA robot, while the design of the experiment was carried out using the Taguchi method, which consisted of variables including welding current, voltage, and speed. This work seeks to relate such process parameters to the resulting microstructure and mechanical properties of the deposited material. Material characterization was carried out using SEM, while tensile tests, following ASTM E8/E8M standards, evaluated mechanical properties. The findings demonstrate that process optimization has huge potential in the real improvement of performance and reliability of 308 stainless steel components; hence, it has significantly high value in industrial applications, especially within the sector of power generation. This research will help add to the current literature an understanding of how WAAM process parameters influence 308 SS candidates, thus allowing some valuable insights related to the optimization of manufacturing processes with respect to the properties required of the materials.

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