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

  • 제27권11호
  • /
  • Pages.1979-1985
  • /
  • 2003
  • /
  • 1226-4873(pISSN)
  • /
  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지
DOI QR코드

DOI QR Code

1Cr-0.5Mo 강의 재질열화가 프레팅 피로거동에 미치는 영향

The Effect of Degradation on the Fretting fatigue for 1Cr-0.5Mo Steel

  • 권재도 (영남대학교 기계공학부) ;
  • 최성종 (영남대학교 기계공학부) ;
  • 김경수 (영남대학교 대학원 기계공학부) ;
  • 배용탁 (영남대학교 대학원 기계공학부)
  • 발행 : 2003.11.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Fretting is a kind of surface degradation mechanism observed in mechanical components and structures. The fretting damage decreases in 50-70% of the plain fatigue strength. This may be observed in the fossil power plant and the nuclear power plant used in special environments and various loading conditions. The thermal degradation of material is observed when the heat resisting steel is exposed for long period time at the high temperature. In the present study, the degraded 1Cr-0.5Mo steel used for long period time at high temperature (about 515$^{\circ}C$) and artificially reheat-treated materials are prepared. These materials are used for evaluating an effect of thermal aging on the fretting fatigue behavior. Through the experiment, it is found that the fretting fatigue endurance limit of the reheat-treated 1Cr-0.5Mo steel decreased about 46% from the non-fretting fatigue endurance limit, while the fretting fatigue endurance limit of the degraded 1Cr-0.5Mo steel decreased about 53% from the non-fretting fatigue endurance limit. The maximum value of fatigue endurance limit difference is observed as 57%(244 MPa) between the fretting fatigue of degraded material and non-fretting fatigue of reheat-treated material. These results can be a basic data to a structural integrity evaluation of heat resisting steel considered to thermal degradation effect.

키워드

참고문헌

  1. Nishizaka, Y., Hara, Y., Hori, A., Tsukahara, H., Miyano, K., Wada, T. and Cox, T. B., 1985, 'Changes in Microstructure and Mechanical Properties of Cr-Mo Reactor Vessel Steels During Long-Term Services,' Journal of Pressure Vessel Technology, Vol. 107, pp. 285-294 https://doi.org/10.1115/1.3264452
  2. Watanabe, Y. and Shoji, T., 1991, 'The Evaluation of in-service Materials Degradation of Low Alloy Steels by The Electrochemical Method,' Met. Trans., Vol. 22A, pp. 2097-2106 https://doi.org/10.1007/BF02669877
  3. Trautwein, A and Gysel, W., 1982, 'Influence of Long-Time Aging of CF8 and CF8M Cast Steel at Temperatures Between 300 and $500^{\circ}C$ on Impact Toughness and Structural Properties,' ASTM STP 756
  4. Waterhouse, R. B., 1992, 'Standardization of Fretting Fatgue Test Method and Equipment,' ASTM STP 1159, pp. 60-66
  5. Challenger, K. D., Miller, A. K. and Brinkman, C. R., 1981, 'An Explanation for the Effects of Hold Periods on the Elevated Temperature Fatigue Behavior of 2$^1_4$ Cr-Mo Steel,' J. Eng. Mat. Tech., Vol. 103. pp. 7-14 https://doi.org/10.1115/1.3224979
  6. 材上賀國, 1983, '壓力容器容 Cr-Mo 鋼の燒屯脆性 に關する硏究,' 博士學位論文, 大阪大學工學部
  7. Kwon, J. D., Sang, S. S., Choi, S. J., 2001, 'A Study on Material Degradation and Fretting Fatigue Behavior,' Transaction of the KSME, A, Vol.25, No. 8, pp. 1287-1293
  8. Biss, V. A. and Wada, T., 1985, 'Microstructural Changes in 1Cr-0.5Mo Steel after 20 Years of Service,' Met. Trans., Vol. 16A, pp. 109-114 https://doi.org/10.1007/BF02656718
  9. Kwon, J. D., Bae, Y. T., Choi, S. J., 2000, 'Evaluation of Degradation Behavior of the Long-Term Serviced Boiler Header,' Transaction of the KSME, A, Vol. 24, No. 7, pp. 1673-1680
  10. ASTM, 'Conducting Constant Amplitude Axial Fatigue Tests of Metallic Materials,' ASTM E 466-82, pp. 470-474
  11. The Society of Materials Science, Japan, 1996, Data Book on Fatigue Strength of Metallic Materials, Vol. 1, p. 192
  12. Fouvry, S., Kapsa, P. and Vincent, L., 'Fretting-Wear and Fretting Fatigue: Relation Through a Mapping Concept,' ASTM STP 1367, pp. 49-64
  13. 博士學位論文, 大阪大學工學部 壓力容器容 Cr-Mo 鋼の燒洵脆性 に關する硏究 材上賀國