Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on Stress Analysis of Small Punch-Creep Test and Its Experimental Correlations with Uniaxial-Creep Test

소형펀치-크리프 시험에 대한 응력해석과 일축 크리프 시험과의 상관성에 관한 연구

  • 이송인 (전북대학교 기계항공시스템공학부) ;
  • 백승세 (전북대학교 대학원 정밀기계공학과) ;
  • 권일현 (전북대학교 기계항공시스템공학부) ;
  • 유효선 (전북대학교 기계항공시스템공학부)
  • Published : 2002.12.01
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Abstract

A basic research was performed to ensure the usefulness of Small Punch-creep(SP-creep) test for residual life evaluation of heat resistant components effectively. This paper presents analytical results of initial stress and strain distributions in SP specimen caused by constant loading for SP-creep test and its experimental correlations with uniaxial creep(Ten-creep) test on 9Cr1MoVNb steel. It was shown that the initial maximum equivalent stress, ${\sigma}_{eq{\cdot}max}$ from FE analysis was correlated with steady-state equivalent creep strain rate, ${\epsilon}_{qf-ss'}$ rupture time, $t_r$, activation energy, Q and Larson-Miller Parameter, LMP during SP-creep deformation. The simple correlation laws, ${\sigma}_{sp}-{\sigma}_{TEN}$, $P_{sp}-{\sigma}_{TEN}\; and\; Q_{sp}-Q_{TEN}$ adopted to established a quantitative correlation between SP-creep and Ten-creep test data. Especially, the activation energy obtained from SP-creep test is linearly related to that from Ten-creep test at $650^{\circ}C$ as follows : $Q_{SP-P}\;{\risingdotseq}\;1.37 \;Q_{TEN},\; Q_{SP-{\sigma}}{\risingdotseq}1.53\; Q_{TEN}$.

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References

  1. Ule, B., Sustar, T and Rodic, T., 1997, 'Copernicus-Small Punch Test Method Assessment for the Determination of the Residual Life of Service Exposed Compinents(ERB CIPA CT940103),' Technical Report : Round Robin of Small Punch Creep Tests, IMT Ljubljana
  2. Komazaki, S., Hashida, T and Shoji, T., 2000, 'Development of Small Punch Tests for Creep Property Measurement of W Alloyed 9% Cr Ferritis Steels,' J. of Testing & Evaluation, V. 28, Pt4, pp. 249-256 https://doi.org/10.1520/JTE12102J
  3. Baek, S. S., Na, S. S., Na, E. G and Yu, H. S., 2001, 'Development of Evaluation Technique of High Temperature Creep Test Method(I)-Boiler Superheater Tube-,' Transactions of the KSME, A, Vol. 25, No. 12, pp. 1995-2001
  4. Baek, S. S., Lee, D. H., Yu, H. S and Ha, J. S., 2002, 'Development of Evaluation Technique of High Temperature Creep Test Method(II)-Boiler Header-,' Transactions of the KSME, A, Vol. 26, No. 1, pp. 55-60 https://doi.org/10.3795/KSME-A.2002.26.1.055
  5. Parker, J. D and James, J. D., 1994, 'Creep Behavior of Miniature Disc Specimens of Low Alloy Steel,' ASME PVP, Vol. 279, Developments in a Progressing Technology, pp. 167-172
  6. Wang, N. M., 1970, 'Large Plastic Deformation of a Circular Sheer Caused by Punch Stretching,' J. of Applied Mechanics, 70-APM-KK, pp. 431-440
  7. Mao, X., Shoji, T and Takahashi, H., 1987, 'Characterization of Fracture Behavior in Small Punch Test by Combined Recrystallization-Etch Method and Rigid Plastic Analysis,' J. of Testing & Evaluation, Vol. 15, No. 1, pp. 30-37 https://doi.org/10.1520/JTE11549J
  8. Manahan, M. P., Argon, A. S. and Harling, O. K., 1981, 'The Development of a Miniaturised Disk Bend Test for the Determination of Post-Irradiation Mechanical Properties,' J. of Nuclear Materials, Vol. 103 & 104, pp. 1545 https://doi.org/10.1016/0022-3115(82)90820-0
  9. Li, W., Rodgers, B and Brookfield, D. J., 1999, 'A Finite Element and Experimental Study of Punch and Bulge Testing,' Key Engineering Materials, Vol. 167-168, pp. 55-63 https://doi.org/10.4028/www.scientific.net/KEM.167-168.55
  10. Brookfield, D. J., Li, W., Rodgers, B., Mottershead, J. E., Hellen, T. K., Jarvis, J., Lohr, R., Howard-Hildige, R., Carlton, A and Whelan, M., 1999, 'Meterial Properties form Small Specimens Using the Punch and Bulge Test,' J. of Strain Analysis, Vol. 34, No. 6, pp. 423-435 https://doi.org/10.1243/0309324991513867
  11. Cheon, J. S., 2000, 'Inverse Analysis Approach to Flow Stress Evaluation by Small Punch Test,' Transactions of the KSME, A, Vol. 24, No. 7, pp. 1753-1762
  12. Tettamanti, S and Crudeli, R., 1998, 'Small Punch Creep Test : A Promising Methodology for High Temperature Plant Components Life Evaluation,' Proc. of BALTICA VI Plant Maintenance for Managing Life & Performance, Vol. 2, pp. 501-509
  13. Park, T. G., Yoon K. B., Shim, S. H and Jeong, I. S., 2001, 'Assessment of Creep Properties of 9Cr Steel Using Small Punch Test,' Transactions of the KSME, A, Vol. 25, No. 9, pp. 1493-1500
  14. KIST, 2000, 'Development of High Pressure - Temperature Valve With 9Cr1MoVNb Casting Steel,' UCN 1872-6553-1
  15. UCN 1872-6553-1 Development of High Pressure - Temperature Valve With 9Cr1MoVNb Casting Steel KIST