Abstract
The high temperature creep behavior of heat machine systems such as aircraft engines, boilers and turbines in power plants and nuclear reactor components have been considered as an important and needful fact. There are considerable research results available for the design of high temperature tube materials in power plants. However, few studies on the Initial Strain Method (ISM) capable of securing repair. maintenance. cost loss and life loss have been made. In this method, a long time prediction of high temperature creep characteristics can be dramatically induced through a short time experiment. The purpose of present study is to investigate the high temperature creep life of Udimet 720, SCM 440-STD6l and ICr-0.5Mo steel using the ISM. The creep test was performed at 400℃ to 700℃ under a pure loading. In the prediction of creep life for each materials, the equation of ISM was superior of Larson-Miller Parameter (LMP). Especially, the long time prediction of creep life was identified to improve the reliability
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