Effect of resistance spot welding parameters on the residual stress of automotive ultra high strength steel
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2017
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SENAFOR, 37th; INTERNATIONAL FORGING CONFERENCE, 21th; NATIONAL SHEET METAL FORMING CONFERENCE, 20th; INTERNATIONAL SHEET METAL FORMING CONFERENCE, 7th; BRDDRG CONGRESS, 4th; INTERNATIONAL CONFERENCE ON MATERIALS AND PROCESSES FOR RENEWABLE ENERGIES – BRAZIL/RS, 7th; INTERNATIONAL CONFERENCE ON SURFACE ENGINEERING IN MATERIAL FORMING
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Resumo
Studies on residual stress effect in resistance spot welding (RSW) have not been widely
explored for the new ultra-high strength steels (UHSS), such as, press-hardened steel (PHS)
used for the automotive industry application. The number of PHS parts has been widely
increasing in the vehicle structure, due to its ultra-high tensile strength achieved after the hot
stamping process, which can reach 1500 MPa. This outstanding steel properties is function of
steel grade and is a guaranty for lightweight and safety. Weldability is one of major issues to
allow the large product application in the automotive industry however, the numbers of papers
and works with focus on PHS weldability is still small. The residual stresses in spot welded
joints play an important role in affecting the durability of the joint. It is well known that the
residual stresses may reduce the mechanical properties of the welding joint and contribute to
hydrogen embrittlement effect. This paper has undertaken an experimental survey of residual
stress on 22MnB5 - PHS steel, using X-ray diffraction technique, before any heat treatment, i.e.,
without hot stamping, with variation of the main welding parameters. In general, it was found
that the residual stress results showed a great influence of the resistance spot welding
parameters. The residual stress measures showed levels up to 300 MPa in PHS material, which
can impair the material usage.
Como referenciar
LARA, J.A.C.; COUTO, C.P.; NIZES, A.D.C.; ABBADE, L.; GONSALEZ, B.; COLOSIO, M.A.; ROSSI, J.L. Effect of resistance spot welding parameters on the residual stress of automotive ultra high strength steel. In: SENAFOR, 37th; INTERNATIONAL FORGING CONFERENCE, 21th; NATIONAL SHEET METAL FORMING CONFERENCE, 20th; INTERNATIONAL SHEET METAL FORMING CONFERENCE, 7th; BRDDRG CONGRESS, 4th; INTERNATIONAL CONFERENCE ON MATERIALS AND PROCESSES FOR RENEWABLE ENERGIES – BRAZIL/RS, 7th; INTERNATIONAL CONFERENCE ON SURFACE ENGINEERING IN MATERIAL FORMING, October 04-06, 2017, Porto Alegre, RS. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/34075. Acesso em: 16 May 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.