Thermal Cycling Effects on the Fatigue Behaviour of Low Carbon Steel

Segun Afokhainu Agbadua, Chinedum Ogonna Mgbemena, Chika Edith Mgbemena, Lazarus Onyebuchi Chima

Department of Industrial/Production Engineering, Nnamdi Azikiwe University, Awka,Anambra State, Nigeria.
National Engineering Design Development Institute, Nnewi, Anambra State, Nigeria.

DOI: 10.4236/jmmce.2011.1014106                

Abstract

This paper examines the behavior of low carbon steels subjected to a frequency thermal cycling test. A compositional analysis was performed to ascertain the percentage of carbon in the asreceived materials. The specimens were machined to a precise gauge length and diameter and exposed to various cycles of heat at each temperature. A fatigue test was also performed with the use of Avery Dennison and bending stress was obtained using the curve supplied with the machine. The results from the machine were converted to Mega Pascal (MPa) and the values used to plot S-N curves and fatigue resistance for the specimens at various cycles and different temperatures were established.

Keywords

Carbon Steels, fatigue, thermal cycling, Stress, as-received materials.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Prokopenko, A. V., (1984). A method of evaluation of the life of a structure in programmed cyclic loading. pp 45-50,
[2]	Coffin, L.F., (1979). Fatigue in machines and structures- Power Generation, Fatigue and microstructure. pp 1-27.
[3]	Miner, M. A., Cumulative damage in fatigue transactions ASME, 67, 1945.
[4]	Basquin, O.H., (1910). The exponential law of endurance tests: American Society of Testing Materials, vol 10 pp 625-630.
[5]	McClintock, F. A and Hult, F. A, (1956) .In proceedings 9th inter congress of applied mechanics, University of Brussels, Belgium, vol 8, pp 51
[6]	Manson, S.S and Coffin, L.F., (1954). Behaviour of materials under conditions of thermal stress.
[7]	Coffin L, et al (1954) Apparatus for study of effects of cyclic thermal stresses on ductile metals. Transactions ASME vol 76: pp23-30.
[8]	Roehrig, K., (1978). Thermal fatigue of gray and ductile irons. AFS Trans. 86: 75–88
[9]	Hearn, E. J., (1997). The mechanics of elastic and plastic deformation of solids and structural materials, pp 441-457& 491.