FIELD: metallurgy.
SUBSTANCE: section of the item under load is chosen as a controlled zone; the section is heated, thus plastic deformation is created in it. Size of the controlled zone is measured by movement sensors before and after heating, and as per the change of its size the stressed state of metal before the heating beginning is estimated. Diameter of the heating zone is chosen based on A=(1.3-5.0)d, where d - diameter of the heating zone, and A - diameter of the measurement base of the controlled zone.
EFFECT: improving reliable evaluation of strength and life of welded structures by experimental determination of their stressed state.
3 cl, 2 dwg
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