Experimental Study on Application of Online In-Situ Nondestructive Testing Technology for Early Material Damage
Aiming at the difficult problem of early material damage detection in the engineering field,the laws between the early microscopic damage and mechanical properties of materials and the kinetic behavior of magnetic domains are investigated.The same alternating excitation process produces a series of magnetic effects of magnetic multi-parameter detection technology is used to extract the multi-parameter characteristic values of the material damage state,and establish the corresponding relationship characterization model.Experimental application studies have been carried out on the three aspects,such as fatigue damage degree of in-service equipment,material deterioration and spheroidization degree of pressurized equipment,and quality control of high-end equipment manufacturing and gear grinding burns.The study results show that the established magnetic multi-parameter fusion characterization model can accurately achieve quantitative characterization of material damage,and realize early micro damage non-destructive testing and evaluation of mechanical properties and material deterioration degree of ferromagnetic materials online in-situ.This study is of great significance to the development of online in-situ nondestructive testing technology for early material damage.
Magnetic multi-parametric detection technologyNondestructive testingEarly damageMaterial deteriorationFatigue testGrinding burnsQuality control
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