SciELO - Scientific Electronic Library Online

 
vol.22 número1Soldagem de Topo por Fricção entre a Liga de Alumínio 6351-T6 e o Aço SAE 1020 Assistida por Indução EletromagnéticaEstudo dos Parâmetros de Polaridade Negativa na Soldagem MIG/MAG Polaridade Variável para Revestimento índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Soldagem & Inspeção

versão impressa ISSN 0104-9224versão On-line ISSN 1980-6973

Resumo

LEMOS, Guilherme Vieira Braga et al. Residual Stress Evaluation in Friction Stir Welds of Inconel 625. Soldag. insp. [online]. 2017, vol.22, n.1, pp.35-45. ISSN 0104-9224.  http://dx.doi.org/10.1590/0104-9224/si2201.05.

The use of noble materials is a basic requirement in applications where an aggressive environment such as offshore industry and nuclear energy. In this scenario, the Inconel 625 is often used as clad material in rigid pipes. Thus, nickel superalloys play a fundamental role in the deepwater exploration fields and, therefore, understanding of modern welding methods applied to these alloys and their consequences in the residual stress states is very important. Hence, this work evaluates the residual stress distributions after Friction Stir Welding (FSW) applied on Inconel 625 sheets. FSW was performed with tool rotational speed in the range of 200 to 1200 rpm and welding speed constant. Measurements of superficial residual stresses were investigated by X-ray Diffraction. In addition, macrostructures and heat input were evaluated. Although there are only few reports related to FSW applied on Inconel alloys, probably due to this welding process difficulty, it has been regarded that there is cumulative application of a solid state welding as an excellent alternative for nickel superalloys. The results showed that different welding parameters produced distinctly welded joints and consequently changes in the residual stress distributions. Finally, an increase in the tool rotation speed increased the residual stress in the stir zone.

Palavras-chave : Residual stresses; X-ray diffraction; Inconel 625; Friction Stir Welding.

        · resumo em Português     · texto em Português     · Português ( pdf )