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Creep-Life Prediction and Its Error Analysis by the Time Temperature Parameters and the Minimum Commitment Method

시간-온도 파라미터법과 최소구속법에 의한 크리프 수명예측과 오차 분석

  • Published : 2007.02.01

Abstract

To predict long-term creep life from short-term creep life data, various parametric methods such as Larson-Mille. (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 $700^{\circ}C$ and $750^{\circ}C$. It was found that the MCM were lower in the SE values when compared to the TTP methods.

Keywords

Minimum Commitment Method;Time-Temperature Parameter;Standard Error;Standard Error of Mean

References

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