FIELD: diagnosing of condition of articles and evaluation of their remaining life. SUBSTANCE: basing on results of bend testing of specimens of article made of material to be tested at cyclic loading at preset temperature, dependence of ratio of bending at moment of beginning of quick increase of bending to bending at initial moment of loading from number of loading cycles at moment of beginning of quick increase of bending of article made of material to be tested is determined. Dependence, thus obtained, is approximated by linear function and using equation thus formed bending of article at moment of quick increase of bending is determined. Diagnostic symptom of crack is excess over or equality of article bending value measured at cyclic loading relative to bending found from equation. EFFECT: improved accuracy of evaluation of condition of articles. 1 tbl, 13 dwg
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