PROCESS OF TEST OF LOADING DEGREE OF STRUCTURE MADE FROM AUSTENTIC AND AUSTENTIC-FERRITE STEELS Russian patent published in 1997 - IPC

FIELD: testing. SUBSTANCE: process is based on preliminary test of standard specimen, on establishment of dependence between change of magnetic characteristic and stress, on loading of structure in elastic region with establishment of similar dependence and comparison of obtained results. Local magnetization is used as magnetic characteristic, number of dependences between local magnetization and stress under loading of standard specimen above yield point and under unloading are set on which sections of elastic loading and unloading are isolated, envelope of maximum stresses is plotted. After this structure is loaded in elastic region and dependence between local magnetization and stress is established for it. From number of dependences for specimen one selects dependence with inclination angle of unloading section equal to inclination angle for structure and stress used to evaluate loading degree of structure is found by point of crossing of mentioned unloading section with envelope of maximum stresses. EFFECT: improved authenticity of process.