E-Journal of Advanced Maintenance (EJAM)


	Vol.10 No.2(Aug) Vol.10 No.1(May) Vol.9 No.4(Feb) Vol.9 No.3(Nov)
< Other Issues


Measures for Tsunami Striking Nuclear Power Station in Japan Special Article: The Great Tohoku Earthquake (1)
The Tragedy of “To Be” Principle in the Japanese Nuclear Industry
	Planning and Consideration on SFR R&D Activities in China
< All Occasional Topics


	A New Mechanical Condition-based Maintenance Technology Using Instrumented Indentation Technique
	Survey robots for Fukushima Daiichi Nuclear Power Plant


Vol.1 No.1 ← GA 5 - AP 6 - 7 - NT 7 - 7(1) - 7(2) - 8 - 9 → Vol.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)


	ICMST-Tohoku 2018 Oct. 23 - 26, 2018 Sendai, Japan
	ICMST-Shenzhen 2016 Nov 1 - 4, 2016 Shenzhen, China (EXIT THIS PAGE)
	ICMST-Kobe 2014 Nov 2(Sun) - 5(Wed), 2014 Kobe, Japan
Nuclear Regulation Authority	Outline of the New Safety Standards for Light Water Reactors for Electric Power Generation
	For Public Comment Outline of New Safety Standard (Design Basis)
	For Public Comment New Safety Standards (SA) Outline (Draft)
	For Public Comment Outline of New Safety Standard(Earthquake and Tsunami)(DRAFT)