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Evaluation of AISI 4140 Steel Repair Without Post-Weld Heat Treatment

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Abstract

The present work evaluates the two-layer technique on the heat affected zone (HAZ) of AISI 4140 steel welded with different heat input levels between the first and second layer. The weld heat input levels selected by the Higuchi test were 5/5, 5/10, and 15/5 kJ/cm. The evaluation of the refining and/or tempering of the coarsened grain HAZ of the first layer was carried out using metallographic tests, microhardness measurements, and the Charpy-V impact test. The tempering of the first layer was only reached when the weld heat input ratio was 5/5 kJ/cm. The results of the Charpy-V impact test showed that the two-layer technique was efficient, from the point of view of toughness, since the toughness values reached were greater than the base metal for all weld heat input ratios applied. The results obtained indicate that the best performance of the two-layer deposition technique was for the weld heat input ratio 5/5 kJ/cm employing low heat input.

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Acknowledgments

The authors thank the laboratories ENGESOLDA and LACAM of UFC and LEM of CEFET-CE for their laboratory support. They also thank Petrobras for their support in the research and the development agencies (CNPq, FINEP, and ANP/PRH-31) for financial support.

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Authors and Affiliations

  1. Departamento de Engenharia Metalúrgica e de Materiais, Laboratório de Engenharia de Soldagem, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil

    Cleiton C. Silva, Willys M. Aguiar & Jesualdo P. Farias

  2. Laboratório de Ensaios Mecânicos, Centro Federal de Educação Tecnológica do Ceará, Gerência da Área de Indústria, Fortaleza, Ceará, Brazil

    Victor H.C. de Albuquerque, Cícero R.O. Moura & Willys M. Aguiar

  3. Petróleo Brasileiro S/A, Refinaria Lubrificantes e Derivados de Petróleo do Nordeste, Serviço Próprio de Inspeção de Equipamentos, Fortaleza, Ceará, Brazil

    Cícero R.O. Moura

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  1. Cleiton C. Silva
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  2. Victor H.C. de Albuquerque
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Correspondence to Cleiton C. Silva.

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Silva, C.C., de Albuquerque, V.H., Moura, C.R. et al. Evaluation of AISI 4140 Steel Repair Without Post-Weld Heat Treatment. J. of Materi Eng and Perform 18, 324–331 (2009). https://doi.org/10.1007/s11665-008-9294-5

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  • DOI: https://doi.org/10.1007/s11665-008-9294-5

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