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Phase Transformation upon Dissimilar Laser Welding of Al5083 and SS304

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TMS 2024 153rd Annual Meeting & Exhibition Supplemental Proceedings (TMS 2024)

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The welding of dissimilar metals is desirable for light-weighting applications in many industries. The brittle intermetallic compounds present in the dissimilar joints of aluminum alloys and stainless steel affect the joint mechanical properties adversely. To improve the dissimilar joint properties, phases including intermetallics in the joints must be identified. Dissimilar joints of Al5083 and SS304 are fabricated with different laser power, ranging from 1 to 2 kW. These joints were subjected to characterization for phase identification and microhardness testing. Phases were predicted by Thermo-Calc software and validated through XRD results and relevant literature. At the dissimilar interface, the first phase Fe2Al5 is experimentally observed from the aluminum/steel chemical reaction. Phases were also predicted through Thermo-Calc software. It predicted Fe2Al5 and FeAl3 at the interface, while XRD results showed only Fe2Al5 at the interface. High heating and cooling rate in laser welding leads to non-equilibrium conditions, and it suppresses certain phases. The high hardness at the interface of Al/steel butt joint is attributed to the brittle intermetallics.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India

    Parth Vaidya & Amber Shrivastava

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  1. Parth Vaidya
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  2. Amber Shrivastava
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Correspondence to Amber Shrivastava .

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    Vaidya, P., Shrivastava, A. (2024). Phase Transformation upon Dissimilar Laser Welding of Al5083 and SS304. 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_155

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