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Indexed by:会议论文

Date of Publication:2008-01-01

Included Journals:CPCI-S

Page Number:281-285

Key Words:Creep fracture; Rupture strength; Life prediction; Heat-resistance steel

Abstract:The current paper discusses the selection of Manson-Haferd constants for rupture life prediction by comparison with Larson-Miller method. It indicates that the change of Larson-Miller constant C(LM) has obvious effect on the predicting result of rupture life. However, for Manson-Haferd parameter model, constant T(a) and logt(a) are not independent variable but show a linear relationship: logt(a)=27.015-0.0267T(a). It is shown that desirable correlation results and prediction accuracy can be obtained even the values of Manson-Haferd constants (T(a), logt(a)) are selected in a wide range. Unified Manson-Haferd constants of T(a)=450 and logt(a)=15 are recommended to analyze the creep rupture data with high prediction accuracy.