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

  • 제28권4호
  • /
  • Pages.427-434
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  • 2004
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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429EM 스테인리스강의 고온 저주기 피로 거동

Low Cycle Fatigue Behavior of 429EM Stainless Steel at Elevated Temperature

  • 이금오 (한국과학기술원 기계공학과) ;
  • 윤삼손 (한국과학기술원 기계공학과) ;
  • 홍성구 (한국과학기술원 기계공학과) ;
  • 김봉수 (현대자동차 Vehicle Development & Analysis Team) ;
  • 이순복 (한국과학기술원 기계공학과)
  • 발행 : 2004.04.01
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초록

Ferritic stainless steel is recently used in high temperature structures because of its good properties of thermal fatigue resistance, corrosion resistance, and low price. Tensile and low-cycle fatigue (LCF) tests on 429EM stainless steel used in exhaust manifold were performed at several temperatures from room temperature to 80$0^{\circ}C$. Elastic Modulus, yield strength, and ultimate tensile strength monotonically decreased when temperature increased. Cyclic hardening occurred considerably during the most part of the fatigue life. Dynamic strain aging was observed in 200~50$0^{\circ}C$, which affects the cyclic hardening behavior. Among the fatigue parameters such as plastic strain amplitude, stress amplitude, and plastic strain energy density (PSED), PSED was a proper fatigue parameter since it maintained at a constant value during LCF deformation even though cyclic hardening occurs considerably. A phenomenological life prediction model using PSED was proposed considering the influence of temperature on fatigue life.

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참고문헌

  1. Fujita, N., Ohmura, K., Kikuchi, M., Suzuki, T., Funaki, S., and Hiroshige, I., 1996, 'Effect of Nb on High-Temperature Properties for Ferritic Stainless Steel,' Scripta Materialia, Vol. 35. No. 6, pp. 705-710 https://doi.org/10.1016/1359-6462(96)00214-X
  2. Kaneko, Y., Mimaki, T. and Hashimoto, S., 1999, 'Cyclic Stress-Strain Response of Ferrtic Stainless Steel Single Crystals with the (112) Primary Slip Plane,' Acta Mater, Vol. 47, No. 1, pp. 165-173 https://doi.org/10.1016/S1359-6454(98)00338-3
  3. Kim, D. W., Ryu, W. S., Kim, W. G. and Kuk, I. H., 1999, 'Nucleation of Low Cycle Fatigue Crack at High Temperature in Nitrogen Alloyed Type 316L Stainless Steel,' J. Kor. Inst. Met. & Mater., Vol. 37, No. 5, pp. 539-542
  4. Morrow, J. D., 1964, ASTM STP 378, p. 45
  5. Cortie, M. B.,and Pollak, H., 1995, 'Embrittlement and Aging at $475^\circ C$ in an Experimental Ferritic Stainless Steel Containing 38wt.% Chromium,' Material Science and Engineering, A199, pp. 153-163
  6. Newell, H. D., May 1946, Metal Progress, p. 977
  7. Gordon Parr, J., 1998, Introduction to Stainless Steel, 3rd Ed., ASM International, p. 108
  8. Hong, S. G., Lee, S. B., 2003, 'The Influence of Dynamic Strain Aging on Tensile and LCF Properties of Prior Cold Worked 316L Stainless Steel,' KSME Transaction A, Vol. 27, No. 8, pp. 1398-1408 https://doi.org/10.3795/KSME-A.2003.27.8.1398
  9. Armas, A. F., Avalos, M., Alvarez-Armas, I., Petersen, C., and Schmitt, R., 1998, 'Dynamic Strain Ageing Evidences During Low Cycle Fatigue Deformation in Ferritic-Martensitic Stainless Steel,' J. of Nuclear Materials, Vol. 258-263, pp. 1204-1208 https://doi.org/10.1016/S0022-3115(98)00187-1
  10. Castelli, M. G., Miner, R. V. and Robinson, D. N., 1993, 'Thermomechanical Fatigue Behavior of a Dynamic Strain Aging Alloy, Hastelloy X,' Thermomechanical Fatigue Behavior of Materials, ASTM STP 1186, pp. 106-125
  11. Robinson, J. M. and Shaw, M. P., 1994, 'Microstructural and Mechanical Influences on Dynamic Strain Aging Phenomena,' International Materials Reviews, Vol. 39, No. 3, pp. 113-122 https://doi.org/10.1179/imr.1994.39.3.113