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Published in: Journal of Materials Engineering and Performance 9/2022

18-03-2022 | Technical Article

Fatigue Crack Growth on Flash Butt Welded and Laser Beam Welded Joints in a High-Strength Low-Alloy Steel

Authors: Henrique Varella Ribeiro, Milton Sérgio Fernandes Lima, José Benedito Marcomini, Filipe Corrêa Pinto, Carlos Antonio Reis Pereira Baptista

Published in: Journal of Materials Engineering and Performance | Issue 9/2022

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Abstract

High strength low-alloy (HSLA) steels have been employed in the automotive industries to produce chassis, part of suspensions, and truck wheels, among others. They present good strength and mechanical toughness, in addition to good formability and weldability. However, good weldability depends on the welding process and parameters. For mechanical components with occurrence of cracks, fatigue life can be quantified by the fatigue crack growth stage. This paper aims to evaluate the fatigue crack growth in HSLA steel plates welded by flash butt welding and laser beam welding. The different welding processes and welding parameters used resulted in their distinct microstructures. The different microstructures showed significant differences in hardness; however, they showed no significant differences in fatigue crack growth. Moreover, the weld beads showed higher resistance to fatigue crack growth when compared to the base metal. For cracks propagating across the weld beads obtained by laser beam welding, with crack initiating at the base metal and growing toward the heat-affected zone and weld bead, a drop in the fatigue crack growth rate was observed as the crack tip approached the microstructure gradient found between these regions.

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Metadata
Title
Fatigue Crack Growth on Flash Butt Welded and Laser Beam Welded Joints in a High-Strength Low-Alloy Steel
Authors
Henrique Varella Ribeiro
Milton Sérgio Fernandes Lima
José Benedito Marcomini
Filipe Corrêa Pinto
Carlos Antonio Reis Pereira Baptista
Publication date
18-03-2022
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 9/2022
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-022-06795-4

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