LONG-TERM CREEP STRENGTH ESTIMATION METHOD, RESIDUAL SERVICE LIFE ESTIMATION METHOD AND RESIDUAL SERVICE LIFE EVALUATION DEVICE FOR PRECIPITATION STRENGTHENING TYPE HEAT RESISTANT ALLOY

PROBLEM TO BE SOLVED: To improve prediction accuracy of creep rupture strength of a precipitation strengthening type Ni base superalloy and evaluation accuracy of a residual service life after actual machine use, and to secure long-term reliability of a high temperature component.SOLUTION: A creep r...

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Hauptverfasser:	ICHIKAWA KUNIHIRO, KONNO SHINYA
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING METALLURGY PHYSICS TESTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator	ICHIKAWA KUNIHIRO KONNO SHINYA
description	PROBLEM TO BE SOLVED: To improve prediction accuracy of creep rupture strength of a precipitation strengthening type Ni base superalloy and evaluation accuracy of a residual service life after actual machine use, and to secure long-term reliability of a high temperature component.SOLUTION: A creep rupture test in limited time is performed, rupture stress and creep rupture time twhich are the results thereof are used to determine a stress index n of a creep deformation speed and a constant Cin a following equation (5) from following equations (5)-(7) and (2), and long-term creep strength of a precipitation strengthening type heat resistant alloy is estimated using the following equations (5)-(7) and (2): ln =-(1/n)lnCMP+C...(5), CMP=(( /F)-2)(d-d)...(6), d=(kt+d)...(7), and k=(C/T)exp(-Q/RT)...(2).
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subjects	ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING METALLURGY PHYSICS TESTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
title	LONG-TERM CREEP STRENGTH ESTIMATION METHOD, RESIDUAL SERVICE LIFE ESTIMATION METHOD AND RESIDUAL SERVICE LIFE EVALUATION DEVICE FOR PRECIPITATION STRENGTHENING TYPE HEAT RESISTANT ALLOY
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