Microstructural characterisation of thick-walled wire arc additively manufactured stainless steel
نویسندگان
چکیده
• Microstructural features of a thick-walled WAAM stainless steel part are investigated. Microstructure exhibits periodically repeating characteristics across the part. Oriented and textured structure with large grains at overlapping region adjacent fusion zones. Significant spatial variations in terms zone shape, grain structure, texture, phases. Wire arc additive manufacturing (WAAM) is class technologies suitable for producing parts due to its high material deposition building rates. Among many possible materials processed by WAAM, austenitic steels, e.g. 316L, commonly employed. The 316L thin has been studied extensively before. However, multiwalled or thick remain largely unexplored. Hence, this study, microstructure 316LSi characterised detail. consists highly-oriented columnar dominated epitaxial competitive growth. regions between neighbouring zones contain long dominant <100> which cross several layers aligned direction. grains' internal an austenite matrix, ferrite locally varying dendritic morphologies dispersed oxide inclusions. texture spatially varies part, variation correlated local thermal gradient induced strategy processing conditions used during
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ژورنال
عنوان ژورنال: Journal of Materials Processing Technology
سال: 2022
ISSN: ['0924-0136', '1873-4774']
DOI: https://doi.org/10.1016/j.jmatprotec.2021.117373