4020 水素放出スペクトル解析によるタービンロータ鋼の材質劣化評価(S25-4 損傷評価,S25 材料・構造の非弾性挙動・高温強度・損傷評価)  [in Japanese] 4020 Evaluation of Material Degradation of Turbine Rotor Steel by Hydrogen Desorption Spectrum Analysis  [in Japanese]

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Abstract

The thermal desorption spectroscopic analysis after the hydrogen charging was applied to the interrupted creep specimens to investigate the effect of creep on the changes in hydrogen desorption characteristic of high Cr turbine rotor steel. In addition, the measured spectra were decomposed to two different spectra and their changes with aging and creep were investigated to correlate the variations in spectrum with the microstructural changes. Experimental results revealed that the applied stress had no large influence on the change in hydrogen spectrum and the amount of hydrogen desorbed at temperatures ranging from R.T. to 250℃ decreased significantly with increasing creep life fraction at the early stage of life. The changes in decomposed spectra in the low and high temperature regions were also discussed from the standpoints of the variations in lath-martensite structure and precipitation behavior of carbides and Laves phase, respectively.

Journal

  • The proceedings of the JSME annual meeting

    The proceedings of the JSME annual meeting 2006.1(0), 969-970, 2006

    The Japan Society of Mechanical Engineers

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