The increasing demand for designing complex structures using Functionally Graded Material boosts the research on reliable joining processes. For several industrial applications in the automotive, tooling, and petrochemical industries, the joining of a stainless steel with a low-alloy steel is often required to obtain a variation of mechanical and corrosion properties when different parts of the same structure are subjected to different working conditions. Welding a stainless steel with a low-alloy steel is a challenging operation because it is not easy to control the microstructure of the welded joint and to avoid metallurgical defects such as hot cracks. Moreover, traditional welding methods can only be applied to relatively simple geometries. To design and produce multi-material components, characterised by complex geometries, Selective Laser Melting process capabilities can be exploited. In this paper, an AISI 316L stainless steel is joined to 16MnCr5 steel by carefully tuning the process parameters. Metallurgical investigations coupled with Energy Dispersion Spectroscopy analyses allowed to evaluate the soundness of the joint and the effect of the process thermal cycle on the alloy microstructures and properties. The results are very promising and show that a careful selection of process parameters allows to obtain a continuous joint.

Joining Dissimilar Steels by Means of Selective Laser Melting: Material Microstructure and Interfacial Characteristics / Cortis, D.; Pilone, D.; Campana, F.; Broggiato, G.; Orlandi, D.. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 53:(2024), pp. 136-143. (Intervento presentato al convegno ESIAM 2023 tenutosi a Porto) [10.1016/j.prostr.2024.01.017].

Joining Dissimilar Steels by Means of Selective Laser Melting: Material Microstructure and Interfacial Characteristics

Cortis D.;Pilone D.;Campana F.;Broggiato G.;
2024

Abstract

The increasing demand for designing complex structures using Functionally Graded Material boosts the research on reliable joining processes. For several industrial applications in the automotive, tooling, and petrochemical industries, the joining of a stainless steel with a low-alloy steel is often required to obtain a variation of mechanical and corrosion properties when different parts of the same structure are subjected to different working conditions. Welding a stainless steel with a low-alloy steel is a challenging operation because it is not easy to control the microstructure of the welded joint and to avoid metallurgical defects such as hot cracks. Moreover, traditional welding methods can only be applied to relatively simple geometries. To design and produce multi-material components, characterised by complex geometries, Selective Laser Melting process capabilities can be exploited. In this paper, an AISI 316L stainless steel is joined to 16MnCr5 steel by carefully tuning the process parameters. Metallurgical investigations coupled with Energy Dispersion Spectroscopy analyses allowed to evaluate the soundness of the joint and the effect of the process thermal cycle on the alloy microstructures and properties. The results are very promising and show that a careful selection of process parameters allows to obtain a continuous joint.
2024
ESIAM 2023
16MnCr5; AISI 316L; Functionally Graded Material; Microstructure; Selective Laser Melting
04 Pubblicazione in atti di convegno::04c Atto di convegno in rivista
Joining Dissimilar Steels by Means of Selective Laser Melting: Material Microstructure and Interfacial Characteristics / Cortis, D.; Pilone, D.; Campana, F.; Broggiato, G.; Orlandi, D.. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 53:(2024), pp. 136-143. (Intervento presentato al convegno ESIAM 2023 tenutosi a Porto) [10.1016/j.prostr.2024.01.017].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1705942
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