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Creep Behavior of 9% Ni Alloy Steel at Elevated Temperatures

  • Received : 2010.03.05
  • Accepted : 2011.08.16
  • Published : 2011.08.31

Abstract

Little design data is available for the creep life prediction of 9% Ni alloy in elevated temperatures. Therefore, in this study, a series of creep tests under 16 combined conditions with 4 kinds of stresses and 4 temperatures was performed to obtain creep design and life prediction data for 9% Ni alloy, with the following results. The stress exponents decreased as the test temperature increased. The creep activation energy gradually decreased as the stresses became larger. The Larson-Miller parameter (LMP) constant for this alloy was estimated to be about 2.

Keywords

Creep;Elevated temperature;Larson-Miller parameter;Life prediction;Activation energy

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