서지주요정보
429EM 스테인리스 강의 열적 기계적 피로 특성에 관한 실험적 연구 = An experimental study on thermo-mechanical fatigue life of 429EM stainless steel
서명 / 저자 429EM 스테인리스 강의 열적 기계적 피로 특성에 관한 실험적 연구 = An experimental study on thermo-mechanical fatigue life of 429EM stainless steel / 이금오.
저자명 이금오 ; Lee, Keum-Oh
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 비공개원문

소장정보

등록번호

8013891

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 03049

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Thermomechanical fatigue(TMF) is a unique type of fatigue process when material is simultaneously subjected to fluctuating temperature and load. Isothermal fatigue life predictions are not suitable to TMF conditions since most of material properties and damage mechanisms are temperature dependent. There have been little studies of TMF on ferritic stainless steel since it is not generally used in high temperature. The 429EM stainless steel is ferritic stainless steel which will be used in exhaust manifold. Induction heater and suitable induction coil was developed to make the TMF waveform. Tensile tests, low cycle fatigue(LCF) tests and TMF tests were performed at several temperature from room temperature(RT) to 600℃. Elastic Modulus, yield stress and UTS decreased when temperature increased. Considerable cyclic hardening occurred during most of life. The relationship between fatigue life and temperature did not show simple monotonic relation. The longest life at same total strain range occurred at 200℃ and the shortest life occurred at 400℃. It is regarded as embrittlement of ferritic stainless steel near 400℃. The TMF life at same total mechanical strain range was much shorter than the shortest LCF life in the temperature range of TMF. The cycles to failure depended on the phase between temperature and strain energy density. The effect of phase to the life is very complex. The life of in-phase condition was shorter than that of out-of-phase condition during 350-550℃. But the phase effect during 350-650℃is negligible. Hysteresis loops of in-phase and out-of-phase are symmetric on the origin. To the result of this behavior, creep effect is negligible in this temperature range on 429EM stainless steel.

서지기타정보

서지기타정보
청구기호 {MME 03049
형태사항 viii, 87 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Keum-Oh Lee
지도교수의 한글표기 : 이순복
지도교수의 영문표기 : Soon-Bok Lee
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 86-87
주제 열적 기계적 피로
페라이트 스테인리스 강
고온 저주기 피로
thermo-mechanical fatigue
ferritic stainless steel
high temperature low cycle fatigue
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