Influence of Heat Control on Welding Stresses in Multilayer-Component Welds of High-Strength Steel S960QL

Abstract:

Today high-strength structural steels (yield strength ≥ 960 MPa) are increasingly applied. Therefore, weldments have to achieve equal strength. Yet, high residual stresses in those welds diminish the components safety. Especially high restraint intensities can lead to crack-critical stress-levels. A special 2-MN-test facility allowed online-measurements of global reaction forces under defined restraint conditions during welding and cooling of multilayer-component MAG-welds. Local residual stresses were measured via X-ray diffraction before and after relief of the restraint. Local and global stresses were highly affected by heat control.

• Periodical: Advanced Materials Research (Volume 996)
• Pages: 475-480
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.996.475
• Online since: August 2014
• Authors: Dirk Schröpfer*, Thomas Kannengiesser, Arne Kromm
• Keywords: High Strength Steel (HSS), Reaction Stress, Welding, X-Ray Diffraction (XRD)

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