報告書番号

E282005

タイトル（和文）

THE ELEVATED-TEMPERATURE FATIGUE LIFE ESTIMATION AND CRACK PROPAGATION BEHAVIOR OF IN-718 ALLOY FOR GAS TURBINE DISK

タイトル（英文）

THE ELEVATED-TEMPERATURE FATIGUE LIFE ESTIMATION AND CRACK PROPAGATION BEHAVIOR OF IN-718 ALLOY FOR GAS TURBINE DISK

概要 （図表や脚注は「報告書全文」に掲載しております）

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概要 （英文）

A COMBINED-CYCLE POWER GENERATION SYSTEM HASENTERED INTO A STAGE OF PRACTICAL USE BASED ON CLEAN FUELS.THERE IS A TREND THAT THE EFFICIENCY IMPROVEMENT OF A GAS TUNBINE IS PURSUED WITH AN INCREASE IN SERVICE TEMPERATURE IN THE FUTURE.FROM A LONG-RANGE STANDPOINT,SUCH A COMBINED-CYCLE SYSTEM WILL ALSO CONTRIBUTE TO THE PRACTICAL USE OF COAL-GASIFICATION POWER GENERATION. HENCE THE IMPORTANCE IS INCREASING OF THE RESEARCH AND DEVELOPMENT OF SUPERALLOYS FOR HIGH-TEMPERATURE EQUIPMENTS AND COMPONENTS,INCLUDING A BLADE,A VANE AND A COMBUSTOR,REQUIRED FOR RISING THE SERVICE TEMPERATURE OF A GAS TURBINE,IN ADDITION TO THEM,A STUDY ON A DISK ALLOY IS INDISPENSABLE BECAUSE HIGH RELIABILITY IS REQUIRED FOR A DISK WHICH IS A HIGH-SPEED ROTATING BODY AT ELEVATED TEMPERATURES. CRIEPI HAS CO-OPERATED IN A TRIAL PRODUCTION OF ANI-BASE SUPERALLOY IN 718 DISK OF WHICH THE WORKING TEMPERATURE REACHES TO 600 DEGREE,AND MAINLY REPORTED THE ESTIMATION TEST RESULTS ELEVATED-TEMPERATURE FATIGUE STRENGTH.FURTHERMORE,THIS REPORT PRESENTS THE RESULTS OF ELEVATED-TEMPERATURE FATIGUE LIFE ESTIMATION AND CRACK PROPAGATION BEHAVIOR WHICH ARE IMPORTANT FOR DESIGN,OPERATION AND MAINTENANCE.

報告者

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