Estimation of Fatigue Limit in Interior Inclusion Induced Fracture Mode for Bearing Steel in Rotating Bending

Abstract:

The fatigue life forming fine granular area (FGA) is expected to occupy a large fraction of the total fatigue life. In order to examine the commencing time of the FGA forming and estimate the fatigue limit in the interior inclusion induced fracture mode, rotating bending fatigue tests were carried out by using SUJ2 specimens with and without the hydrogen charge. Especially, the hydrogen charge time was set in the wide variety of the cyclic loadings to confirm the FGA forming process supposing the effect of the hydrogen charge on the fatigue crack propagation behavior. From experimental and analytical results, it is concluded that the FGA formation is already started at early stage as 5 % of the fatigue life. Another finding is that we have a clear correlation between the stress intensity factor range and the FGA growth ratio. Based on this aspect, the critical value of the stress intensity factor range in which the FGA is not formed around the inclusion was given as 2.65 MPa.

• Periodical: Key Engineering Materials (Volume 664)
• Pages: 188-198
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.664.188
• Online since: September 2015
• Authors: Noriyasu Oguma*, Naoya Sekisugi, Yasuhiro Odake, Tatsuo Sakai
• Keywords: Fine Granular Area, High Carbon Chromium Bearing Steel, Interior Inclusion, Rotating Bending, Very High Cycle Fatigue

References

[1] T. Sakai, M. Takeda, K. Shiozawa, Y. Ochi, M. Nakajima, T. Nakamura and N. Oguma, Experimental evidence of duplex S-N characteristics in wide life region for high strength steels, Proceedings of the 7th international fatigue congress, 1 (1999).

[2] K. Shiozawa, L. Lu and S. Ishihara, Subsurface fatigue crack initiation behavior and S-N curve characteristics in high carbon chromium bearing steel, Journal of the Society of Materials and Science, Japan, 48 (1999) 1095-1100.

DOI: 10.2472/jsms.48.1095

[3] H. Mughrabi, Zur dauerschwingfestigkeit im bereich extrem hoher bruchlastspielzahlen: mehrstufige lebensdauerkurven, Harterei-Technische Mitteilungen, 56 (2001) 300-303.

[4] T. Sakai, Y. Sato and N. Oguma, Characteristic S-N properties of high-carbon-chromium-bearing steel under axial loading in long-life fatigue, Fatigue & Fracture of Engineering Materials & Structures, 25 (2002) 765-773.

DOI: 10.1046/j.1460-2695.2002.00574.x

[5] Q. Y. Wang, C. Bathias, N. Kawagoishi and Q. Chen, Effect of inclusion on subsurface crack initiation and gigacycle fatigue strength, International Journal of Fatigue, 24 (2002) 1269-1274.

DOI: 10.1016/s0142-1123(02)00037-3

[6] C. Bathias and P.C. Paris, Rotating-bending internal crack stress correction, Gigacycle Fatigue in Mechanical Practice, Marcel Dekker, New York, Section 4. 7 (2005) 125-127.

[7] T. Sakai, Review and prospects for current studies on very high cycles fatigue of metallic materials for machine structural use, Journal of Solid Mechanics and Materials Engineering, 3, 3 (2009) 425-439.

DOI: 10.1299/jmmp.3.425

[8] N. Oguma, B. Lian, T. Sakai, K. Watanabe and Y. Odake, Long life fatigue fracture induced by interior inclusions for high carbon chromium bearing steels under rotating bending, Journal of ASTM International, 7, 9 (2010) 1-9.

DOI: 10.1520/jai102540

[9] C. Berger and H. J. Christ, Proceedings of VHCF-5, DVM, Berlin (2011).

[10] N. Oguma, H. Harada and T. Sakai, Mechanism of long life fatigue fracture induced by interior inclusion for bearing steel in rotating bending, Journal of the Society of Materials and Science, Japan, 52 (2003) 1292-1297.

DOI: 10.2472/jsms.52.1292

[11] N. Oguma, H. Harada and T. Sakai, Strength Level Dependence of Long-Life Fatigue Behavior in Interior Inclusion Induced Fracture for Bearing Steel in Rotating Bending, Transactions of the Japan Society of Mechanical Engineers, A-70, 690 (2004).

DOI: 10.1299/kikaia.70.221

[12] Y. Murakami, T. Nomoto and T. Ueda, Factors influencing the mechanism of superlong fatigue failure in steels, Fatigue & Fracture of Engineering Materials & Structures, 22 (1999) 581-590.

DOI: 10.1046/j.1460-2695.1999.00187.x

[13] L. T. Lu and K. Shiozawa, Effect of Shot-Peening on Super-Long-Life Fatigue Bahavior in High Carbon-Chromium Bearing Steel, Transactions of the Japan Society of Mechanical Engineers, A-67, 662 (2001) 1630-1638.

DOI: 10.1299/kikaia.67.1630

[14] Y. Kuroshima, T. Ikeda, M. Harada and S. Harada, Subsurface crack growth behavior on high cycle fatigue of high strength steel, Transactions of the Japan Society of Mechanical Engineers, 64, 626 (1998) 2536-2541.

DOI: 10.1299/kikaia.64.2536

[15] L. Lu and K. Shiozawa, Effect of Two-Step Load Variation on Super-Long Life Fatigue and Internal Crack Growth Behavior of High Carbon-Chromium Bearing Steel, Transactions of the Japan Society of Mechanical Engineers, A-68, 675 (2002) 1666-1673.

DOI: 10.1299/kikaia.68.1666

[16] Y. Akiniwa, K. Tanaka and A. Nakatsu, Evaluation of fatigue strength in very-long life regime of SNCM439 steels, Transactions of the Japan Society of Mechanical Engineers, A-70, 696, (2004) 1036-1041.

DOI: 10.1299/kikaia.70.1036

[17] M. Nakajima, N. Kamiya, H. Itoga, K. Tokaji and H. N. Ko, Experimental Estimation of Subsurface Crack Initiation Lives and Intrinsic Fatigue Limit in a High Strength Steel, Transactions of the Japan Society of Mechanical Engineers, A-70, 699 (2004).

DOI: 10.1299/kikaia.70.1636

[18] A. Sugeta, Y. Sugiyama and K. Minoshima, Ultra-high cycle fatigue characteristics and interior crack growth behavior under repeated two-step loading on high strength steel, JSME Annual Meeting, Osaka, (2007) 345-346.

DOI: 10.1299/jsmemecjo.2007.1.0_345

[19] S. Mizushima, N. Oguma, Y. Odake, and Y. Shimada, Influence of neglect time after hydrogen-charging for fatigue life of bearing steel in rotating bending, Proceedings of The 31st Symposium on Fatigue, Japan, 30 (2012) 134-137.

[20] N. Oguma, N. Sekisugi, K. Kida, Y. Odake and T. Sakai, Period of fine granular area formation of bearing steel in very high cycle fatigue regime, Advanced Materials Research, 891-892 (2014) 434-439.

DOI: 10.4028/www.scientific.net/amr.891-892.434

[21] R. E. Peterson, Stress Concentration Design Factors, John Wiley & Sons, Inc., New York, (1962) 50.

[22] N. Oguma and T. Sakai, Fatigue life prediction for bearing steel failed with fish-eye at subsurface in rotating bending, Journal of the Society of Materials and Science, Japan, 50 (2001) 516-523.

DOI: 10.2472/jsms.50.516

[23] Y. Murakami, S. Kodama, S. Konuma, Quantitative evaluation of effects of non-metallic inclusion on fatigue strength of high strength steel, Transactions of the Japan Society of Mechanical Engineers, A-54, 500 (1998) 688-696.

DOI: 10.1299/kikaia.54.688