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- W795845867 abstract "Multi-information fusion is the trend of NDT equipment s. This paper describes the principle, configuration and application of EMS-2003 —- a new de vice combining metal magnetic memory, eddy current and magnetic flux leakage t esting techniques. By using the three complementary NDT techniques, we are able to make complete testing and analysis on early damages and established defects in in-service parts. Multi-information fusion is prevailing in today's NDT te chnology. This technology enables smaller size and more powerful functions. Micr oscopic & macroscopic stress concentration is the primary cause of damage of metal parts. The stress concentration of ferromagnetic materials represents magnetic memory. Therefore, diagnosis in stress-concentrated areas is an important part of the i n-service testing. In 1990s, Russian scientists firstly developed the new genera tion intellectual MMM diagnosis device based on magnetic memory effect (1) . The device enables early diagnosis of in-service ferromagnetic parts to identify stress concen tration and metal defects. The advantages of this technique include easy operation, no need of surface pretreatment, quick diagnosis etc. But, for precise testing of fatigue-induced cracks and defect development in the stress-concentrated area, other techniques must be used. W hereas, conventional NDT techniques (such as ultrasonic, magnetic powder, MFL, Penetrate, EC and Radial testing etc.), which are widely used in industrial testing, have some techni cal limitation that they can only defect established defects. In short, each NDT technique has its limitation. So, the author developed a integrated portable testing system combing the MMM, EC and MFL techniques. This system combines the advantages of the three complementary techniques. It can detect stress concentration as well as established defects, h elpful for accurate testing of parts and projection of service life. 2. Principle of MMM Technique" @default.
- W795845867 created "2016-06-24" @default.
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- W795845867 date "2008-01-01" @default.
- W795845867 modified "2023-09-27" @default.
- W795845867 title "Research & Development of Integrated MMM/EC/MFL Testing System" @default.
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- W795845867 hasPublicationYear "2008" @default.
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