IGTC-99 THE CHARACTERISTICS OF THERMAL-MECHANICAL FATIGUE STRENGTH IN SUPERALLOYS FOR GAS TURBINE(Session C-5 Material and Manufacturing II)

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概要

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• A high-temperature gas-turbine is now being developed for a high-efficiency gas-steam combined-cycle power plant. Superalloys used for this gas-turbine are required to have an excellent thermal fatigue strength, good creep/creep-rupture strength, and hot-corrosion resistance. In this study, the thermal fatigue life characteristics of such superalloys were experimentally investigated. As a result, it was found that thermal fatigue life depended on the strength as well as the ductility of the alloy, and so, the best result of thermal fatigue life prediction was obtained by applying the total strain range vs. life relationship, which was obtained isothermally at the maximum temperature in thermal fatigue. It was also found that directional solidification and hot isostatic pressing extended the high-temperature low-cycle fatigue of cast superalloys.

• 公益社団法人日本ガスタービン学会の論文

著者

• Nitta A.

  Central Research Institute of Electric Power Industry

• Kitamura T.

  Central Research Institute of Electric Power Industry

関連論文

• IGTC-99 THE CHARACTERISTICS OF THERMAL-MECHANICAL FATIGUE STRENGTH IN SUPERALLOYS FOR GAS TURBINE
• IGTC-99 THE CHARACTERISTICS OF THERMAL-MECHANICAL FATIGUE STRENGTH IN SUPERALLOYS FOR GAS TURBINE(Session C-5 Material and Manufacturing II)
• IGTC-74 The High-Temperature Strengths of Single Crystal Superalloys for Gas Turbine(Session C-1 MATERIAL I)

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