Creep Behavior of 9% Ni Alloy Steel at Elevated Temperatures |
Suh Chang-Min,Oh Sang-Yeob |
School of Mechanical Engineering Kyungpook National University,School of Automotive Engineering Kyungpook National University |
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© 2011 The Korean Society of Ocean Engineers
Open access / Under a Creative Commons License
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Keywords:
Creep, Elevated temperature, Larson-Miller parameter, Life prediction, Activation energy |
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. |
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