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J. Ocean Eng. Technol. 1996;10(1):47-52.    

Improvement of long-time creep life prediction of steam turbine rotor steel
증기 터빈축 강재의 장시간 크리프 수명 예측법 개선
오세규,정순억,전태언
부산수산대학교 기계공학과,경상대학교 수대 기관공학과,부산수산대학교 기계공학과
Copyright © 1996 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Key Words: Creep Life Prediction, Initial Strain Method, High Temperature Creep Properties, Creep Rupture Time, Creep Rupture Strength
핵심용어: 크리프 수명 예측, 초기변형률법, 고온 크리프 특성, 크리프 파단시간, 파단수명, 크리프 파단 강도
Abstract
This paper deals with a study on improvement of long-time creep life prediction of steam turbine rotor steels by using initial strain method as a new approach at high temperatures of 500 to 70$0^{circ}C$ . The main result shows that the inital strain method could be reliably utilized to predict and evaluate the long-time creep life as creep rupture strength and that the predicting equation for long-time creep life under a certain creep stress at a certain high temperature could be empirically derived out from each initial instantaneous strain measured.


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