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Technical gazette, Vol. 25 No. 2, 2018.

Original scientific paper

https://doi.org/10.17559/TV-20160722151049

Dissimilar Laser Welding of AISI 321 and AISI 1010

Elena Manuela Stanciu orcid id orcid.org/0000-0003-4025-3689 ; Transilvania University of Brasov, Department of Materials Engineering and Welding, Colina Univeristatii, 1, Brasov, Romania
Alexandru Pascu orcid id orcid.org/0000-0002-6371-9253 ; Transilvania University of Brasov, Department of Materials Engineering and Welding, Colina Univeristatii, 1, Brasov, Romania
Mircea Horia Tierean ; Transilvania University of Brasov, Department of Materials Engineering and Welding, Colina Univeristatii, 1, Brasov, Romania
Ionut Claudiu Roata orcid id orcid.org/0000-0003-1429-9261 ; Transilvania University of Brasov, Department of Materials Engineering and Welding, Colina Univeristatii, 1, Brasov, Romania
Ionelia Voiculescu orcid id orcid.org/0000-0002-9065-3587 ; Politehnica University of Bucharest, Faculty of Engineering and Management of Technological Systems, Splaiul Independentei, 313, Bucharest, Romania
Iosif Hulka orcid id orcid.org/0000-0001-5442-0631 ; Polytechnic University of Timisoara, Victoriei Sqare, 2, 300006, Timişoara, Romania
Catalin Croitoru orcid id orcid.org/0000-0001-8505-6510 ; Transilvania University of Brasov, Department of Materials Engineering and Welding, Colina Univeristatii, 1, Brasov, Romania

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Abstract

This paper presents the dissimilar laser welding of AISI 321 stainless steel and AISI 1010 carbon steel thin sheets in butt joint geometry using a 1 kW diode laser. Influence of the welding speed on the geometry and microstructure of the joints is discussed. Structural characterisation of the welds is realised through optical, electron microscopy and EDS analysis, observing distinct mixed and unmixed areas in the weld bead because of the high cooling rate. The weld bead presents an austenitic-martensitic-ferrite structure, characterized by austenitic twin grains with ferrite particles precipitated on grain boundaries, and islands comprising a ferrite-martensite structure. Chromium and nickel migration in the weld bead area was observed. Good tensile behaviour of the dissimilar joints was obtained, as all the specimen failure occurs far-off the weld zone.

Keywords

dissimilar welding; laser; microhardness; stainless steel; tensile behaviour

Hrčak ID:

199129

URI

https://hrcak.srce.hr/199129

Publication date:

21.4.2018.

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