Experimental Study on Collective Evolution of Short Fatigue Crack in Low Carbon Steel under Complex Stress State and High Temperature

Abstract:

The collective evolution of short fatigue crack was experimentally studied through differently-notched cylindrical specimens under symmetrical triangle wave load. A simple and feasible method to measure the damage variable was introduced. The crack length and surface damage variable were obtained by the observation system, the measurement software and the Matlab program. The results show that: Grain boundary is the key factor leading to plateau regions phenomena during the increasing process of crack length; the group behavior of short fatigue crack is measurable and can be described by surface damage variable (D); the fitting curves of D-N/N_f present remarkable stage characteristics.

• Periodical: Advanced Materials Research (Volumes 361-363)
• Pages: 1387-1391
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.361-363.1387
• Online since: October 2011
• Authors: Lu Wang, Zheng Wang, Xi Geng Song
• Keywords: Collective Evolution, Complex Stress State, High-Temperature, Short Fatigue Crack, Surface Damage Variable

References

[1] P. Hansson: Int. J. Fatigue. 31 (8-9) (2009) p.1346 –1355.

[2] O. Duber, B. Kunkler, U. Krupp, H. Christ and C. Fritzen: Int. J. Fatigue. 28 (9) (2006) p.983 – 992.

DOI: 10.1016/j.ijfatigue.2005.07.048

[3] S.Suresh: Fatigue of Materials, 2nd Edition, (National defense industrial press, Beijing, 1998). (In Chinese)

[4] K. J. Miller: Fract. Eng. M. 10 (2) (1987) p.93–113.

[5] K. J. Miller: Fatigue. Fract. Eng. M. 10 (1) (1987) p.75–91.

[6] P. Hansson and S. Melin: Eng. Fract.Mech. 77 (11)(2010) p.1907 – 1913.

[7] J. Polak, T. Kruml, K. Obrtlik, J. Man and M. Petrenec: Procedia Engineering. 2 (1) (2010) p.883 –892.

[8] C. Santus and D. Taylor: Int. J. Fatigue. 31 (8-9) (2009) p.1356 – 1365.

[9] K. K. Ray, N. Narasaiah and R. Sivakumar: Mater. Sci. Eng., A 372 (1-2) (2004) p.81 – 90.

[10] J. Ma, B. Zhang, D. Xu, E. H. Han and W. Ke: Int. J. Fatigue. 32 (7) (2010) p.1116 – 1125.

[11] M. Zhang, P. Yang and Y. Tan: Int. J. Fatigue. 21 (8) (1999) p.823 – 830.

[12] M. Aratani and J. Knott: Eng. Fail. Anal. 17 (1) (2010) p.200 – 207.

[13] J. Ma, B. Zhang, D. Xu, E. H. HN. Narasaiah and K. Ray: Int. J. Fatigue. 28 (8) (2006) p.891 – 900.

[14] Y. Yu, X. Liu, C. Zhang and Y. Tan: Chin. J. Mech. Eng. (English Edition) 19 (2) (2006) p.312 – 315.

[15] J.Lemaitre, A course on damage mechanics, 1st Edition, (Science Press, Beijing, 1998). (In Chinese)

[16] Y. Zhao: J. Mater. Sci. Technol. 19 (2) (2003) p.129 – 132.

[17] Y. Zhao, J. Wang and Q. Gao: J. Mater. Sci. Technol. 18 (3) (2002) p.266 – 270.