Hydrogen-Assisted Cracking in GMA Welding of High-Strength Structural Steel—A New Look into This Issue at Narrow Groove
نویسندگان
چکیده
Modern arc processes, such as the modified spray (Mod. SA), have been developed for gas metal welding of high-strength structural steels with which even narrow weld seams can be welded. High-strength joints are subjected to increasingly stringent requirements in terms processing and resulting component performance. In present work, this challenge is met by clarifying influences on hydrogen-assisted cracking (HAC) a steel S960QL. Adapted samples analogous self-restraint TEKKEN test used analyzed respect crack formation, microstructure, diffusible hydrogen concentration residual stresses. The variation seam opening angle between 30° 60°. To prevent HAC, effectiveness dehydrogenation heat treatment (DHT) from investigated. As result, metals produced at reduced show slightly higher concentrations average. addition, increased micro- well macro-crack formation observed these samples. On all without DHT, cracks root notch occur due prevented DHT immediately after welding.
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ژورنال
عنوان ژورنال: Metals
سال: 2021
ISSN: ['2075-4701']
DOI: https://doi.org/10.3390/met11060904