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Article

Fatigue Performance of Laser Welds in Heavy-Gage Press Hardening Steels

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Physical Metallurgy Laboratory/LAMEF–Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 91501-970, Brazil
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Bruning Tecnometal Ltda, Panambi 98280-000, Brazil
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School of Engineering, Federal University of Rio Grande, Porto Alegre 96203-900, Brazil
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Institute for Advanced Studies/IEAV, Technological Institute of Aeronautics/ITA, São José dos Campos 12228-900, Brazil
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Materials and Design Selection Lab, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 90040-020, Brazil
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Department of Materials MTM, Leuven University (KU Leuven), 3001 Heverlee, Belgium
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NiobelCon BV, 2970 Schilde, Belgium
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Authors to whom correspondence should be addressed.
Academic Editor: Aleksander Lisiecki
Metals 2022, 12(4), 580; https://doi.org/10.3390/met12040580
Received: 3 March 2022 / Revised: 16 March 2022 / Accepted: 26 March 2022 / Published: 29 March 2022
(This article belongs to the Topic Laser Welding of Metallic Materials)
This work investigates and compares the fatigue performance of laser-welded joints of two press hardening steels: a standard 22MnB5 and a variant modified by a combination of niobium and molybdenum (NbMo) alloying. The results indicate that joint geometry aspects, superposed to an intrusion-generated damage mechanism, were prevalent in causing a poor fatigue life in the case of peak stress values greater than 11% of the base metal's ultimate strength being around 1450 MPa. As identical process procedures were employed, the tests allowed investigating the influence of the alloy design on fatigue performance. The results of geometrical analysis and fatigue tests indicated that the NbMo modified alloy performed better than the standard 22MnB5 steel. The results also suggest that, if extremely tight quality limits are used in the manufacturing procedures, laser-welded joints of press hardened steels could offer a very favorable fatigue performance being considerably better than that of conventional and high strength structural steels. View Full-Text
Keywords: press hardening steel; laser welding; fatigue behavior; microalloying; heat affected zone microstructure press hardening steel; laser welding; fatigue behavior; microalloying; heat affected zone microstructure
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MDPI and ACS Style

de Almeida, D.T.; Bianchi, K.E.; Corrêa de Souza, J.H.; de Lima, M.S.F.; Clarke, T.G.R.; da Silva, F.P.; Mohrbacher, H. Fatigue Performance of Laser Welds in Heavy-Gage Press Hardening Steels. Metals 2022, 12, 580. https://doi.org/10.3390/met12040580

AMA Style

de Almeida DT, Bianchi KE, Corrêa de Souza JH, de Lima MSF, Clarke TGR, da Silva FP, Mohrbacher H. Fatigue Performance of Laser Welds in Heavy-Gage Press Hardening Steels. Metals. 2022; 12(4):580. https://doi.org/10.3390/met12040580

Chicago/Turabian Style

de Almeida, Diego T., Kleber E. Bianchi, João H. Corrêa de Souza, Milton S.F. de Lima, Thomas G.R. Clarke, Fabio P. da Silva, and Hardy Mohrbacher. 2022. "Fatigue Performance of Laser Welds in Heavy-Gage Press Hardening Steels" Metals 12, no. 4: 580. https://doi.org/10.3390/met12040580

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