시간 -온도 파라미터법과 최소구속법에 의한 크리프 수명예측과 오차 분석

초록

To predict long-term creep life from short-term creep life data, various parametric methods such as Larson-Miller (L-M), Orr-Sherby-Dorn (O-S-D), Manson-Haferd (M-H) parameters, and a Minimum Commitment Method (MCM) were suggested. A number of the creep data were collected through literature surveys and experimental data produced in KAERI. The polynomial equations for type 316LN SS were obtained by the time-temperature parameters (TTP) and the MCM. Standard error (SE) and standard error of mean (SEM) values were obtained and compared with the each method for various temperatures. The TTP methods showed good creep-life prediction, but the MCM was much superior to the TTP ones at 700oC and 750oC. It was found that the MCM were lower in the SE values when compared to the TTP methods.

키워드