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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Nitriding on Fatigue Characteristics of Cr-Mo Alloy Steel

고장력 Cr-Mo강의 질화처리에 따른 피로특성

  • Oh, Kwang Keun (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.) ;
  • Kim, Jae Hoon (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.) ;
  • Choi, Hoon Seok (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
  • 오광근 (충남대학교 기계설계공학과) ;
  • 김재훈 (충남대학교 기계설계공학과) ;
  • 최훈석 (충남대학교 기계설계공학과)
  • Received : 2015.02.05
  • Accepted : 2015.04.01
  • Published : 2015.06.01

Abstract

CrMo alloy steel was nitrided using two types of processing methods, ion-nitriding processing and nitrocarburizing. Both processes were conducted for a duration of 30 min. To compare the surface hardness of the alloys created by the different processes, microhardness tests were conducted, and fatigue tests of each material were performed by a cantilever rotary bending fatigue test machine (Yamamoto, YRB 200) in the very high cycle regime ($N>10^7cycle$). Fractography of the fractured surfaces was conducted by scanning electron microscopy - to observe the fracture mechanisms of very high cycle fatigue and the effect of the nitriding process on the fatigue characteristics.

Keywords

Fatigue Life;Initial Crack;Nitriding Processing;SEM;Very High Cycle Fatigue

File

Download PDF

References

  1. Won, S. J., Lim, B. S., Ha, J. Y. and Nam, K. S., 2000, "A Study on the Fatigue Strength of SACM 645 Steel Under Various Nitriding Methods and Times," Transactions of The Korean Society of Automotive Engineers, Vol. 9, No. 1, pp. 216-221.
  2. Park, S. H. and Lee, C. S., 2012, "Tensile and High Cycle Fatigue Properties of Ion-nitrided and Nitro-carburized SCR430B Steel," Transactions of Materials Processing, Vol.21, No. 6, pp. 354-359 https://doi.org/10.5228/KSTP.2012.21.6.354
  3. Myeong, N. J., Choi, N. S. and Kwon, H., 2014, "Dynamic Analysis of Specimen Under Ultrasonic Fatigue Using Finite Element Method," Trans. Korean Soc. Mech. Eng. A, Vol 38, No. 7, pp. 771-717. https://doi.org/10.3795/KSME-A.2014.38.7.771
  4. Suh, C. M., Suh, C. H. and Suh M. S., 2013, "VHCF Characteristics of SCMH2 Steel Depending on the Surface Treatment Conditions," Journal of Korean Welding Joint Society, Vol. 31, N0. 4, pp. 47-53.
  5. Walter D. Pilkey, 1997, Peterson's Stress Concentration Factors, John Wiley &Sons, New York, p. 124.
  6. Sengul A. B. and Celik, A., 2011, "Effect of Plasma Nitriding on Fatigue Crack Growth on AISI4140 Steel Under Variable Amplitude Loading," Surface & Coating Technology, Vol.205, Issues 21-22, pp. 5172-5177. https://doi.org/10.1016/j.surfcoat.2011.05.027
  7. Zhang, J. W., Lu, L. T., Shiozawa, K., Zhou, W. N. and Zhang, W. H., 2011, "Effects of Nirocarburizing on Fatigue Property of Medium Carbon Steel in Very High Cycle Regime," Materials Science and Engineering A, Vol. 528, Issues 22-23, pp. 7060-7067. https://doi.org/10.1016/j.msea.2011.05.029
  8. Zhang, J. W., Lu, L. T., Shiozawa, K., Zhou, W. N. and Zhang, W. H., 2011, "Effect of Nitrocarburizing and Post-oxidation on Fatigue Behavior of 35CrMo Alloy Steel in Very High Cycle Fatigue Regime," International journal of Fatigue, Vol. 33 , Issues 7, pp. 880-886. https://doi.org/10.1016/j.ijfatigue.2011.01.016
  9. Jeon S. B., 2009, Fatigue Failure, R&B INC., No. RB-FA-G004, p. 9.

Cited by

  1. Optimization of Inner Nitriding Process for Cr-Mo-V Steel of Small Arms Barrel by using Taguchi Experimental Design Method vol.17, pp.3, 2018, https://doi.org/10.14775/ksmpe.2018.17.3.148