Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
권호 표지

Fatigue Characteristics and FEM Analysis of $18\%$Ni(200) Maraging Steel

18Ni 마르에이징강의 피로특성 및 유한요소해석

  • Published : 2005.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Recently the needs of high reliable substances of high strength and high ductility are gradually increased with the development of aerospace industry. The characteristics of maraging steel has high ductililty, formability, corrosion resistant and high temperature strength and is easy to fabricate, weld and treat with heat, and maintain an invariable size even after heat treatment. e steels are furnished in the solution annealed condition and they achieve full properties through martensitic precipitation aging a relatively simple, low temperature heat treatment. As is true of the heat treating procedures, aging is a time/temperature dependent reaction. Therefore, the objective of this stud)'was consideration of fatigue characteristics according as Nb(niobium) content and time/temperature of heat treatment change. Also the stress analysis, fatigue lift, and stress intensity factor were compared with experiment results and FEA(finite element analysis) result. The maximum ftresses of)( Y, and Z axis direction showed about $2.12\times$10$^{2}$MPa, $4.40\times$10$^{2}$MPa and $1.32\times$10$^{2}$MPa respectively. The fatigue lives showed about $7\%$ lower FEA result than experiment result showing almost invariable error every analyzed cycle. Stress intensity factor of the FEA result was lower about $3.5~ 10\%$ than that of the experiment result showing that the longer fatigue crack ten添 the hi인or error. It considered that the cause for the difference was the modeled crack tip having always the same shape and condition regardless of the crack growth.

Keywords

References

  1. Kim, W. Y., Tanaka, H., Kim, M. S., and Hanada, S., 2003, 'High Temperature Strength and Room Temperature Fracture Toughness of Nb-Mo-W Refractory Alloys with and without Carbide Dispersoids,' Material Science and Engineering A346, pp. 65-74
  2. Decker, R. F., and Floreen, S., 1988, Maraging Steels, Recent Developments and Applications, R. K. Wilson(Ed.), TMS, p. 1
  3. Shiang, L. T., and Wayman, C. M., 1998, 'Maraging Behavior in an Fe-19.5Ni-5Mn AlloyI,' Metallography 21, Vol. 399, No. 423, pp. 529-553
  4. Moriyama, M., and Takaki, S., 1997, 'Influence of Reversion Austenite on Fatigue Property of 18% Ni Maraging Steel,' International Journal of Fatigue, Vol. 19, No. 3, pp. 266-267
  5. Tsay, L. W., Lee, W. C., Luu, W. C., and Wu, J. K., 2002, 'Effect of Hydrogen Environment of the Notched Tensile Properties of T-250 Maraging Steel Annealed by Laser Treatment,' Corrosion Science, Vol. 44, No. 6, pp. 1311-1327 https://doi.org/10.1016/S0010-938X(01)00137-8
  6. Hussain, K., Tauqir, A., and Khan, A. Q., 1999, 'Influence of Gas Nitriding on Fatigue Resistance of Maraging Steel,' International Journal of Fatigue, Vol. 21, No. 2, pp. 163-168 https://doi.org/10.1016/S0142-1123(98)00063-2
  7. Shamantha, C. R., Narayanan, R., Iyer, K. J. L., Radhakrishnan, V. M., Seshadri, S. K., Sundararajan, S., and Sundaresan, S., 2000, 'Microstructural Changes During Welding and Subsequent Heat Treatment of 18Ni(250-grade) Maraging Steel,' Material Science and Engineering A, Vol. 287, No. 12, pp. 43-51 https://doi.org/10.1016/S0921-5093(00)00838-8
  8. Stiller, K., Hattestrand, M., and Danoix, F., 1998, 'Precipitation in a 9Ni-12Cr- 2Cu Maraging Steels,' Acta Materialia, Vol. 46, No. 17, pp. 6063-6073 https://doi.org/10.1016/S1359-6454(98)00267-5
  9. Nagayama, K., Terasaki, T., Tanaka, K., Fischer, F. D., Antretter, T., Cailletaud, G., and Azzouz, F., 2001, 'Mechanical Properties of a Cr-Ni-Mo-Al-Ti Maraging Steel in the Process of Martensitic Transformation,' Material Science and Engineering A, Vol. 308, Nos. 1-2, pp. 25-37 https://doi.org/10.1016/S0921-5093(00)01999-7
  10. He, Y., Yang, K., Qu, K., Kong, F., and Su, G., 2002, 'Strengthening and toughening of a 2800-MPa grade maraging Steel,' Materials Letters 56, pp. 763-769 https://doi.org/10.1016/S0167-577X(02)00610-9
  11. Choi, B. K., and Jang, K, C., 2002, 'A Study on the Fatigue Crack Propagation Behavior of SB41 Weldment Materials,' Trans. of the KSMTE, Vol. 11, No. 2, pp. 43-49
  12. Annual Book of ASTM Standards, 1996, 'Section 3 Metals Test Methods and Analytical Procedures,' E 8M-96, Standard Test Methods for Tension of Metallic Materials, pp. 76-96
  13. Annual Book of ASTM Standards, 1996, 'section 3 Metals Test Methods and Analytical Procedures,' E 647-95a, Standard Test Methods for Measurement of Fatigue Crack Growth rates, pp. 565-601
  14. ASTM, 1985, Standard Test Method for Constant- Load Amplitude Fatigue Crack Growth Rate Above 10-8mm/Cycle, E647-83, pp. 765-783
  15. ASME, 1998, 'Boiler and Pressure Vessel Code an International Code III, Division 1 - Subsection NB, Class 1 Components,' Rules For Construction of Nuclear Power Plant Components, pp. 81-130
  16. ASME, 1998, 'COSMOSM Theory,' A Brief Theoretical Background for simplified Elastic-Plastic Formulation, Part 2 FSTAR/Fatigue Analysis, New York, pp. 5-11, 6-8