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Vibratory Stress Relief and Vibratory Weld Conditioning of Flux cored arc welded CA6NM steel

Luiz Fernando Cursino Briet de Almeida Júlio Cesar Lourenço; Maria Ismênia Sodero Toledo; DECIO LIMA VIEIRA; Alain Laurent Marie Robin; Carlos Angelo Nunes

Journal of materials science research (online) v.9, n.1, p.32-41, 2019

Canada 2019

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  • Título:
    Vibratory Stress Relief and Vibratory Weld Conditioning of Flux cored arc welded CA6NM steel
  • Autor: Luiz Fernando Cursino Briet de Almeida
  • Júlio Cesar Lourenço; Maria Ismênia Sodero Toledo; DECIO LIMA VIEIRA; Alain Laurent Marie Robin; Carlos Angelo Nunes
  • Assuntos: TRATAMENTO TÉRMICO; Martensitic Ca6nm Stainless Steel; Welded Joints; Flux Cored Arc Welding; Vibratory Weld Conditioning; Vibratory Stress Relief; Post Weld Heat Treatment
  • É parte de: Journal of materials science research (online) v.9, n.1, p.32-41, 2019
  • Notas: Disponível em: https://doi.org/10.5539/jmsr.v9n1p32. Acesso em: 09 ago. 2022.
  • Descrição: ASTM A743 CA6NM steel is used in the manufacturing of hydraulic turbines components. Multipass welding is commonly used for their fabrication or repairing. In this work, two different vibratory welding procedures were studied: vibration applied during welding (VWC) and vibration applied after welding (VSR). Results have shown that in both conditions, CA6NM steel presented a martensitic microstructure, in which the VSR welded joint presented column-shaped packets and fine martensite delineating the individual beads, while VWC joint presented grain refinement. Heat affected zones (HAZ) presented δ-phase in small amounts for both conditions in the regions which reached higher temperatures. VSR and VWC conditions presented similar behavior in terms of hardness, HAZ hardness values being close to those of the weld metal, except for the root regions, where higher values were obtained. Charpy-V results showed that HAZs presented higher impact values than those of the weld metal. The low impact values of the weld metal were attributed to presence of inclusions from the welding electrode.
  • Editor: Canada
  • Data de criação/publicação: 2019
  • Formato: p. 32-41.
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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