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Vol.1 No.1 ← GA 5 - AP 6 - 7 - NT 7 - 7(1) - 7(2) - 8 - 9Vol.1No.4
Academic Articles
(Contributed Paper) Vol.1 (2009) p.77 - p.82
 
Non-destructive Evaluation of Fatigue Damage in the Stainless Steel by Using Electromagnetic Method
 
Mohachiro OKA1, Terutoshi YAKUSHIJI1, Yuji TSUCHIDA2, and Masato ENOKIZONO2
 
1 Oita National College of Technology, 1666 Maki, Oita, 870-0152, Japan
2 Oita University, 700 Dannoharu, Oita, 870-1192, Japan
 
Abstract
The magnetic property of a semi-stable austenitic stainless steel (SUS304) is changed greatly by martensitic transformation caused by fatigue. It is well known that there is a high correlation between the amount of fatigue damage and the residual leakage magnetic flux density caused by remanent magnetization of it. On the other hand, because a micro structure of metallic materials such as austenitic stainless steels changes by fatigue, it is thought that the resistivity of them changes as well as the change of remanent magnetization as magnetic properties by fatigue. Therefore, we paid attention to the relationship between the amount of fatigue damage and the resistivity of austenitic stainless steels, and did experiments that examined this relation. From our experiments, the change of the resistivity clearly depends on the amount of fatigue damage in austenitic stainless steels. This paper shows the relationship between electromagnetic properties and the amount of fatigue damage of SUS304 and SUS316.
 
Keywords
resistivity, 4-point probe, SUS304, SUS316, fatigue, non-destructive testing
 
Full Text: PDF
 
(Received: April 1st, 2009)