Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Creep Life Prediction for Udimet 720 Material Using the Initial Strain Method (ISM)

  • Kong, Yu-Sik (Research Institute for Industrial Technology Development, Dongeui University) ;
  • Yoon, Han-Ki (School of Mechanical Engineering, Dongeui University) ;
  • Oh, Sae-Kyoo (School of Mechanical Engineering, Pukyong National University)
  • Published : 2003.04.01
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Abstract

Despite of considerable research results or uniaxial tension creep available for superalloys, few studies have been made on high temperature creep using the Initial Stram Method (ISM) In this paper, the real-time prediction of high temperature creep strength and creep lift for the nickel-based superalloy Udimet 720 (high-temperature and high-pressure gas turbine engine materials) was performed on round-bar type specimens under pure static load at the temperatures of 538$^{\circ}C$. 649$^{\circ}C$, and 704$^{\circ}C$. The predictive equation derived from the ISM in creep tests showed better reliability than those from LMP (Larson-Miller Parameter) and LMP-lSM (Larson Miller Parameter-Initial Strain Method) specially for long time creep prediction (10$^3$∼10$\^$5/h).

Keywords

References

  1. Cho, H. S. and Suh, S. J., 1997, 'Friction Welding of Inconel 713C and SCM 440,' Journal of the Korean Welding Society, Vol. 15, No. 6, pp. 564-570
  2. Chang, M. H., Lee, S. G., Hur, K. B., Oh, S. K. and Lee, W. S., 1997, 'Assessment on Creep Properties of High-Temperature Pipeline Materials in Power Plants (I),' Proc. of KSME Spring Annual Meeting A, pp. 80-85
  3. Larson, F. R. and Miller, J., 1952, 'A Time Temperature Relationship for Rupture and Creep Stresses,' Transaction of th ASME, pp. 765-775
  4. Lee, S. G., Chang, M. H., Yun, B. S., Oh, S. K. and Song, J. K., 1997, 'Assessment on Creep Properties of High-Temperature Pipeline Materials in Power Plants (I),' Proc. of KSME Spring Annual Meeting A, pp. 63-67
  5. Na, Y. S., Kim, S. E. and Park, N. K., 1998, 'Sigma Precipitation Behavior in Udimet 720Li Using X-ray diffraction method,' Journal of the Korean Inst. of Met. & Mater., Vol. 36, No. 4, pp. 481-485
  6. Oh, S. K., Kunio, T. and Hasui, A., 1986, 'Effect of Initial Strain on Evaluation of High Temperature Creep Properties of Friction Welded Joints,' Proc. of Asian-Pacific Congress on Materials Strength Evaluation-86, pp. 549-554
  7. Oh, S. K., Park, J. B., Oh, J. H., Song, Y. S. and Jang, J. H., 1992, 'Study on Relationship between High Temperature Creep Properties and Initial Strain of Zircaloy-4,' Proc. of KSME, Nov., pp. 93-96
  8. Oh, S. K., Yoon, M. H., Jeong, S. U. and Oh, J. H., 1993, 'Optimization of Heat Resisting Steels Friction Welding and Its Initial Real-Time Predictability of High Temperature Creep Life of Long Time (I),' Transaction of KSME, Vol. 17, No. 3, pp. 512-519
  9. Oh, S. K., Jeong, S. U. and Oh, J. H., 1993, 'Optimization of Heat Resisting Steels Friction Welding and Its Initial Real-Time Predictability of High Temperature Creep Life of Long Time (II),' Transaction of KSME, Vol. 17, No. 3, pp. 520-526
  10. Oh, S. K., Kim, S. J., Jeong, S. U. and Oh, J. H., 1993, 'Optimization of Heat Resisting Steels Friction Welding and Its Initial Real-Time Predictability of High Temperature Creep Life of Long Time (III),' Transaction of KSME, Vol. 17, No. 4, pp. 746-754
  11. Oh, S. K. and Jeong, S. U., 1993, 'Long Time Creep Strength and Life Prediction of Steam Turbine Rotor Steel by Initial Strain Method,' Transaction of KSME, Vol. 17, No. 6, pp. 1321-1329
  12. Oh, S. K., Kim, S. J. and Jeon, T. E., 1996, 'Development of Long-Time Creep Safety Life Prediction of Steam Turbine Rotor Steel and AE Evaluation (1st Report)-Possibility of Creep Prediction by Initial Strain Method,' Proc. of 6th Internaitonal Offshore and Polar Eng. Conf., ISOPE, Los Angels, pp. 275-279
  13. Oh, S. K., Jeong, S. U. and Jeon, T. E., 1996, 'Improvement of Long-Time Life Prediction of Steam Turbine Rotor Steel,' Journal of Ocean Engineering and Technology, KCORE, Vol. 10, No. 1, pp. 47-52
  14. Oh, S. K., 1998, 'Relationship between Cyclic Creep Properties and Initial Strain of Cr-Mo Alloy Steels at High Temperatures and AE Evaluation,' International Journal of Ocean Engineering and Technology, Vol. 1, No. 1, pp. 78-86