Characterization of strain-induced martensite phase in austenitic stainless steel using a magnetic minor-loop scaling relation

Journal Article · Mon May 05 00:00:00 EDT 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2924305· OSTI ID:21102017

Kobayashi, Satoru; Saito, Atsushi; Takahashi, Seiki; Kamada, Yasuhiro; Kikuchi, Hiroaki ^[1]

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1. NDE and Science Research Center, Faculty of Engineering, Iwate University, Ueda 4-3-5, Morioka 020-8551 (Japan)

We propose a combined magnetic method using a scaling power-law rule and initial permeability in magnetic minor hysteresis loops for characterization of ferromagnetic {alpha}{sup '} martensites in austenitic stainless steel. The scaling power law between the hysteresis loss and remanence is universal, being independent of volume fraction of strain-induced {alpha}{sup '} martensites. A coefficient of the power law largely decreases with volume fraction, while the initial permeability linearly increases, reflecting a change in the morphology and quantity of martensites, respectively. The present method is highly effective for integrity assessment of austenitic stainless steels because of the sensitivity and extremely low measurement field.

• OSTI ID: 21102017
• Journal Information: Applied Physics Letters, Vol. 92, Issue 18; Other Information: DOI: 10.1063/1.2924305; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITIC STEELS
FERROMAGNETIC MATERIALS
HYSTERESIS
MAGNETIC SUSCEPTIBILITY
MARTENSITE
MORPHOLOGY
PARAMAGNETISM
PERMEABILITY
PHASE TRANSFORMATIONS
PLASTICITY