ULTRASONIC AND METALLOGRAPHIC STUDY OF THE HEAT-AFFECTED ZONE OF A CARBON STEEL WELDED JOINT UNDER PLASTIC DEFORMATION AND FATIGUE

Failure of an St3sp steel sample under uniaxial tension and fatigue is studied using metallographic and ultrasonic pulse-echo techniques. Samples are cut out from a welded joint, particularly from a parent metal area and an incomplete recrystallization area in the heat-affected zone. The evolution o...

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Bibliographic Details
Published inJournal of applied mechanics and technical physics Vol. 64; no. 5; pp. 921 - 928
Main Authors Gonchar, A. V., Solov’ev, A. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.10.2023
Springer Nature B.V
Subjects
Applications of Mathematics
Base metal
Carbon steels
Classical and Continuum Physics
Classical Mechanics
Edge dislocations
Fatigue failure
Fluid- and Aerodynamics
Heat affected zone
Mathematical Modeling and Industrial Mathematics
Mechanical Engineering
Mechanical properties
Physics
Physics and Astronomy
Plastic deformation
Recrystallization
Ultrasonic methods
Welded joints
steel
fatigue
microstructure
uniaxial tension
ultrasonic testing
Poisson’s ratio
heat-affected zone
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Summary:Failure of an St3sp steel sample under uniaxial tension and fatigue is studied using metallographic and ultrasonic pulse-echo techniques. Samples are cut out from a welded joint, particularly from a parent metal area and an incomplete recrystallization area in the heat-affected zone. The evolution of persistent slip bands in the heat-affected zone and those in the parent metal are subjected to a comparative analysis. A relationship between Poisson’s ratio determined by the ultrasonic method and the mechanical characteristics of the material is established. Methods for estimating the plasticity life under uniaxial tension and the number of cycles before fatigue failure are proposed.
ISSN:0021-8944
1573-8620
DOI:10.1134/S0021894423050218