EVOLUTION OF CREEP-FATIGUE DAMAGE IN TYPE 304 STAINLESS STEEL AND ITS DETECTION BY ELECTRICAL POTENTIAL METHOD

Abstract

Abstract: Creep-fatigue test was carried out using smooth round bar specimens of Type 304 stainless steel. Cavities and small cracks on the cross-section of the specimen were carefully observed by a scanning laser microscope. Moreover, direct current electrical potential method (DC-EPM) was applied in order to evaluate non-destructively the distribution of internal cracks. The distribution evaluated by DC-EPM agreed well with the actual one.

Key words: creep-fatigue, cavity, small crack, Type 304 stainless steel, electrical potential method

N. Tada; T. Kitamura; R. Ohtani and E. Nakayama (Department of Engineering Physics and Mechanics, Graduate School of Engineering, Kyoto University,Yoshida-hommachi, Sakyo-ku, Kyoto, 606-8501, Japan). EVOLUTION OF CREEP-FATIGUE DAMAGE IN TYPE 304 STAINLESS STEEL AND ITS DETECTION BY ELECTRICAL POTENTIAL METHOD[J]. Acta Metallurgica Sinica (English Letters), 1998, 11(6): 463-469.

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EVOLUTION OF CREEP-FATIGUE DAMAGE IN TYPE 304 STAINLESS STEEL AND ITS DETECTION BY ELECTRICAL POTENTIAL METHOD

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