Magnetic property change of type 304 stainless steel due to accumulation of fatigue damage at elevated temperature

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Takaya, Shigeru^{a; *} | Nagae, Yuji^a

Affiliations: [a] Japan Atomic Energy Agency, 4002 Narita, O-arai, Ibaraki, 311-1393, Japan

Correspondence: [*] Corresponding author. Tel.: +81 29 267 4141; Fax: +81 29 267 3761; E-mail: takaya.shigeru@jaea.go.jp

Abstract: Developing a nondestructive method for estimating material degradation before crack initiation will contribute to improvement of safety and economical efficiency of fast breeder reactor plants. In this study, fatigue tests on type 304 stainless steel at 923 K, measurements of magnetic flux density, and microscopy studies were conducted. As a result, it was shown that the maximum value of variation of magnetic flux density during the fatigue tests increased linearly in relation to the number of loading cycles and this magnetic property change was due to phase transformation.

Keywords: Nondestructive estimation of material degradation, magnetic property, type 304 stainless steel, fatigue damage at elevated temperature

DOI: 10.3233/JAE-2007-895

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 211-217, 2007