Open AccessMicrostructure effect of weld joint heat affected zone on the temperature velocity factor of ultrasound
Author(s) -
А. В. Гончар,
К. В. Курашкин,
V. A. Klyushnikov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/709/3/033061
Subject(s) - welding , temperature gradient , materials science , heat affected zone , joint (building) , ultrasonic sensor , base metal , mechanics , longitudinal wave , ultrasound , microstructure , composite material , acoustics , structural engineering , wave propagation , optics , physics , engineering , quantum mechanics
The effect of temperature on the longitudinal wave speed in the heat-affected zone of the weld joint of structural steel 20 is investigated. The heat-affected zone is the most dangerous place where the stress-strain state is realized and a gradient of physical and mechanical properties is observed. As a rule, it is in the heat-affected zone that the structures are destroyed. The structural state of the heat-affected zone has a significant effect on the temperature dependence of the elastic wave velocity. As a result of the research, numerical values of the temperature-velocity factor for longitudinal ultrasonic waves in steel 20 for the heat-affected zone and the base metal were obtained. In the future, the dependencies can be used to develop methods for determining material damage by the ultrasonic method.