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Volume 46, Issue 2 (October 2017)
Evaluation of Fracture Tearing Resistance of Dissimilar Metal Welds in Laser Welded Thin Steel Sheets
(Received 27 February 2015; accepted 22 November 2016)
Published Online: 31 October 2017
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This paper focused on the stable crack growth in laser welds of thin automotive steel sheets. The stable crack growth was monitored using the contactless measurement—the videoextensometry technique on compact tension (CT) specimens with parallel and perpendicular notch orientation to the longitudinal weld axis. Specimens with electro-spark notches were loaded by eccentric tension at two loading rates (0.0217 and 2.17 mm·s−1). From the obtained data, δR-curve and JR-curve were established. From R-curves, the resistance of the stable crack growth for both, base materials, and their laser welds, was determined. Crack growth resistance determined for a CT weld specimen was higher than for the base materials.
Inst. of Logistics, Faculty of Mining, Ecology, Process Control and Geotechnology, Technical Univ. of Košice, Košice,
Dept. of Materials Science, Faculty of Metallurgy, Technical Univ. of Košice, Košice,
Stock #: JTE20150083
Title Evaluation of Fracture Tearing Resistance of Dissimilar Metal Welds in Laser Welded Thin Steel Sheets