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0209U002431,
0108U004176
,
Modeling and development of calculation methods, and experimental verification of estimation of stress concentration and fracture initiation at grain boundaries of HAZ in welding of high-alloy austenitic steels
Yushchenko Konstantin Andriyovitch, Доктор технічних наук
11-02-2009
E.O. Paton Electric Welding Institute
Analysis of methods for measurement of and published data on local strains in coarse-grained materials with stable austenitic structure was carried out. The methods for measuring plastic strains at a mesolevel are offered. These methods provide for measurements of strains by using measuring grids with a pitch of 0.1 mm and density of 100 points per mm2. In addition, the method for inducing microdisplacements of the surface deformed by high-resolution optical interference was upgraded. It is shown that local boundary strains may be several times higher than the general ones, and may amount to 30 %.
2020-04-02
Updated: 2025-12-07
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