Creep modeling and creep life estimation of Gr.91

The creep behavior and deciding factors for creep life have been investigated for Gr.91 in the temperature range between 450 and 725°C. The longest time to rupture was 68755 h. The creep life is inversely proportional to the minimum creep rate multiplied by the increase in creep rate by strain in the acceleration region for a wide range of test temperature and duration. The minimum creep rate depends on both the time to minimum creep rate and...