Effect of structure of aging metastable austenitic steels on the signal from an eddy-current transducer

Eddy-current parameterf0 of the N26T3 steel has been studied as a function of both the aging temperatureTag=20–800°C and the time τ of exposure to a constant temperature of 550 and 600°C up to 6h. In the initial state, the steel had two phases: (1) cooling-induced martensite+austenite (α+γ) or (2) s...

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Published inRussian journal of nondestructive testing Vol. 36; no. 11; pp. 815 - 825
Main Authors Sandovskii, V A, Uvarov, A I, Vasechkina, T P
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.11.2000
Subjects
Aging (metallurgy)
Austenite
Austenitic stainless steels
Eddy currents
Martensite
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Summary:Eddy-current parameterf0 of the N26T3 steel has been studied as a function of both the aging temperatureTag=20–800°C and the time τ of exposure to a constant temperature of 550 and 600°C up to 6h. In the initial state, the steel had two phases: (1) cooling-induced martensite+austenite (α+γ) or (2) strain-induced martensite+austenite (α′+γ). The parameterf0 drops monotonically as τ increases, and this drop is the faster, the higherTag. The parameterf0 changes nonmonotonically with the aging temperature. In addition to the initial two-phase structures, the one-phase γ structure has also been studied. The parameterf0 grows monotonically with the plastic cold strain and changes nonmonotonically with the aging temperature (20–800°C). Observed changes inf0 have been explained.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1061-8309
1608-3385
DOI:10.1007/BF02759294