Application of Manson–Haferd and Larson–Miller Methods in Creep Rupture Property Evaluation of Heat-Resistant Steels

The current paper discusses the selection of Manson-Haferd and Larson-Miller constants on correlation results of creep rupture property in several heat-resistant steels. It indicates that the change in Larson—Miller constant C LM has obvious effect on the predicting result of rupture life and the optimal C LM values will depend on materials and the optimal ranges of the values are narrow. However, for Manson-Haferd constants T a and log t a , they are at least phenomenally not independent variables but show a linear relationship: log t a = 27.015 - 0.0267T a . It is shown that the values of Manson-Haferd constants (T a , log t a ) can be selected in a wide range with desirable correlation accuracy and a set of Manson-Haferd constant (T a = 450, log t a = 15) is recommended to correlate the creep rupture data.