Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

Effect of Static Load Level of Ultrasonic Nanocrystal Surface Modification Technology on Fatigue Characteristics of SKD61

초음파 나노 표면개질 기술의 정하중 레벨이 SKD61 강의 피로특성에 미치는 영향

  • Suh, Chang-Min (Department of Mechanical Engineering Graduate School, Kyungpook National University) ;
  • Kim, Sung-Hwan (Department of Mechanical Engineering Graduate School, Kyungpook National University)
  • 서창민 (경북대학교 기계공학부) ;
  • 김성환 (경북대학교 기계공학부)
  • Published : 2008.04.28
Download PDF
⟨ Previous Next ⟩

Abstract

Ultrasonic nanocrystal surface modification (UNSM) is a method to induce severe plastic deformation to a material surface, so that the structure of the material surface becomes a nanocrystal structure from the surface to a certain depth. It improves the mechanical properties, namely hardness, compressive residual stress, and fatigue characteristics. Specimens of SKD61 were tested to verify the effects of the variation of UNSM static load level on fatigue characteristics. The results were as follows: the grain size of SKD61 treated with UNSM became very fine from the material surface to a $100{\mu}m$ depth. The surface hardness of SKD61 was increased up to 37% after UNSM. And fatigue strength at $10^7$ cycles was increased by 8.3, 11.2, and 17.9% respectively, when the static load levels of UNSM were 4, 6, 8 kgf.

Keywords

References

  1. Suh, C.M., Kim, K.R. and Lee, D.W. (1998). 'Fatigue Strength of TiAlN Ceramic Coated 1Cr-1Mb-0.25V Steel at Elevated Temperatures', Inter. Journal of Ocean Eng. & Technology, Vol 1-1, pp 70-77
  2. 우창기, 김희송 (1989). '반복인장-압축하중을 받는 이온질화 처리한 SM45C의 부식피로 파괴거동에 관한 연구', 대한기계학회 논문집, 제13권, 제3호, pp 451-460
  3. Kwak, B.M. and Gil, Y.J. (1985). 'An Indirect Experimental Method for the Determination of Mechanical Properties of Ion-nitrided Layer and Residual Stress Distribution', Tran. of the Korean Society of Mechanical Eng. Vol 9, No 2, pp 240-249
  4. Kim, K.R., Suh, C.M., Murakami, R.I. and Chung, C.W. (2003) 'Effect of Intrinsic Properties of Ceramic Coatings on Fatigue Behavior of Cr-Mo-V Steels', 171, pp 15-23 https://doi.org/10.1016/S0257-8972(03)00229-9
  5. Pyoun, Y.S. and Son, K.G. (2005). 'Development of D2 Tool Steel Trimming Knives with Nanoscale Microstructure, AIS-Tech Vol 2, pp 465-468
  6. Park, J., Cho, I.H. and Kang, J.H. (2005). 'Extending Service Life by Surface Modification of Local Area on Stretch Level Roll in PL-TCM line', AIS-Tech Vol 2, pp 347-348
  7. Cho, I.H., Song, G.H., Kim, C.S., Suh, C.M. and Park, J.H. (2005). 'Nano Structured Surface Modification of Tool Steel and Its Bereficial Effects in Mechanical Properties', Journal of Mechanical Science and Technology, Vol 19, pp 2151-2156 https://doi.org/10.1007/BF02916512
  8. Stephens, R.I., Fatemi, A., Stephens, R.R. and Fuchs Henry O. (2001). 'Metal Fatigue in Engineering', Wiley interscience, 2nd Edition, pp 59-89
  9. Barsom, J.M. and Rolfe, S.T. (1999). 'Fracture and Fatigue Control in Structure', Buttworth Heinemann, 3rd Edition, pp 163-192
  10. Banantine, J.A., Comer, J.J. and Handrock, J.L.(1990). 'Fundamentals of Metal Fatigue Analysis, Prentice Hall, pp 1-15
  11. Suh, C.M., Hwang. J.K., Son, K.S. and Jang, H.K. (2005). 'Fatigue Characteristics of Nitrided SACM 645 according to the Nitriding Condition and Notch', Materials Science and Engineering A 392, pp 31-37 https://doi.org/10.1016/j.msea.2004.07.066