Identifying residual stresses in laser welds by fatigue crack growth acceleration measurement
Source abstract
Abstract
During laser welding, residual stresses are thermally induced. They can have strong impact on the fatigue behavior and fatigue life. A standardized measurement method for the fatigue crack growth rate was expanded to identify residual stress along the cracking path. The second derivative of the measured crack opening and in turn the crack acceleration corresponded well with distinct acceleration maxima and minima and accordingly with tensile and compressive stress, as was basically proven by numerical simulation. The method is simple and extendable. It provides valuable information, as was demonstrated for various situations.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Welding Techniques and Residual Stresses · Fatigue and fracture mechanics · Advanced Welding Techniques Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Luleå University of Technology Department of Engineering Sciences and Mathematics, , Luleå 971 87, Sweden
University of Oulu Oulu Southern Institute, , Pajatie 5, Nivala FI-85500, Finland
SINTEF Materials and Chemistry , N-7465 Trondheim, Norway
References (24)
Show source-provided references
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