Abstract
Wire arc additive manufacturing is economical when compared against traditional methods and can save up to 50% on fabrication investment. In this study, deposits of SS316L are fabricated with wire arc additive manufacturing with cold metal transfer mode. The directional cooling along the build direction leads to the epitaxial grain growth. The electron back scattered diffraction is used to analyse the microstructure. The phase map indicates the presence of austenite (γ) and residual ferrite (δ) phases. The grain coarsening of the previously deposited layers takes place as the next layer is deposited, due to additional heat input and partial re-melting of previously deposited layer(s). The tensile test of samples along the build, travel, and diagonal directions reveal significant anisotropy. The mechanical performance along the diagonal direction is better than the other directions.
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Mishra, N.K., Nakrani, J., Ajay, V., Shrivastava, A. (2024). Microstructural Evolution and Anisotropy in Stainless Steel 316L from Wire Arc Additive Manufacturing. In: TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50349-8_26
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DOI: https://doi.org/10.1007/978-3-031-50349-8_26
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