As a novel non-excavation and non-destructive testing(NDT)method,metal magnetic memory(MMM)testing technique has attracted extensive attention due to its ease of operation,dispensability of magnetization,and predictive ability of early defects.However,most researchers in this field focus on small components currently,and relative experiments are mainly performed in laboratories.There are few research results relevant to magnetic memory detection of buried pipelines in actual work environments.From this,this paper reviewed the recent international research achievements of magnetic memory detection technology,summarized the effect principle of the technology,sorted out the main theories of the basic theoretical mechanism,and then analyzed the influencing factors and effects of the magnetic memory signals of buried oil and gas pipelines in the work settings.On this basis,this paper presented the current problems and future research directions in the magnetic memory detection technology of buried pipelines.
Magnetic memory testingStress concentrationBuried pipelinesOil and gas pipelinesNon-excavation testingMagnetic memory signal
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维普
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