Elevated Temperature Fatigue Life Investigation of Aluminium Alloy based on the Predicted S-N Curve
Keywords:Aluminium alloy, elevated temperature, fatigue life, load sequences, S-N curve
This paper discusses a methodology used to predict the stress-life (S-N) curve at elevated temperatures based on the normal S-N curve. Fatigue tests were performed under stress control at room temperature in accordance with the ASTM E466 standard to obtain a normal S-N curve. In addition, the tests were performed at both room and elevated temperatures using constant-amplitude, high-to-low sequence, and low-to-high sequence loadings to investigate the effect of the load sequence at elevated temperatures on fatigue life. Three elevated temperature regimes at 70 to 250Â°C were chosen based on the maximum temperature of the engine mount bracket and the cylinder head that can be reached during normal service. The results show that the fatigue lives were significantly affected by the load sequences at both room and elevated temperatures. Furthermore, the existing fatigue data obtained at elevated temperatures can be used to predict the corresponding S-N curves.
Post, N. L., Case, S. W., Lesko, J. J. 2008. Modeling the Variable Amplitude Fatigue of Composite Materials. International Journal of Fatigue. 30: 2064â€“2086.
Zhang, Y. H., Maddox, S. J. 2009. Investigation of Fatigue Damage to Welded Joints Under Variable Amplitude Loading Spectra. International Journal of Fatigue. 31: 138â€“152.
Wei, L. W., de los Rios, E. R., James, M. N. 2001. Experimental Study on Modelling of Short Fatigue Crack Growth in Aluminium Alloy A17010-T7451 Under Random Loading. International Journal of Fatigue. 24: 963â€“975.
Tokaji, K. 2006. High Cycle Fatigue Behaviour of Ti-6Al-4V Alloy at Elevated Temperatures. Scripta Materialia. 54: 2143â€“2148.
Bahaideen, F. B., Saleem, A. M., Hussain, K., Ripin, Z. M., Ahmad, Z. A., Samad, Z., Badarulzaman, N. A. 2009. Fatigue Behaviour of Aluminium Alloy at Elevated Temperature. Modern Applied Science. 3: 52â€“61.
Lee, Y.L., Pan, J., Hathaway, R. B., Barkey, M. E. 2005. Fatigue Testing and Analysis (Theory and Practice). United State of America: Elsevier Butterworth-Heinemann.
ASTM Standard E466-96. 2003. Standard Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests Of Metallic Materials. Annual Book of ASTM Standard Vol. 03.01. ASTM International.
Zhu, X., Shyam, A., Jones, J. W., Mayer, H., Lasecki, J. V., Allison, J. E. 2006. Effects of Microstructure and Temperature on Fatigue Behaviour of E319-T7 Cast Aluminium Alloy in Very Long Life Cycles. International Journal of Fatigue. 28: 1566â€“1571.
Pereira, H. F. S. G., de Jesus, A. M. P., Ribeiro, A. S., Fernandas, A. A. 2008. Influences of Loading Sequence and Stress Ratio on Fatigue Damage Accumulation of a Structural Component. Science and Technology of Materials. 20: 60â€“67.
Abdullah, S., Choi, J. C., Giacomin, J. A., Yates, J. R. 2006. Bump Extraction Algorithm for Variable Amplitude Fatigue Loading. International Journal of Fatigue. 28: 675â€“691.
Draper, J. 2007. Modern Metal Fatigue Analysis. United kingdom: Emas Publishing.
Liu, Y., Yu, J. J., Xu, Y., Sun, X. F., Guan, H. R., Hu, G. Q. 2007. High Cycle Fatigue Behaviour of a Single Crystal Super Alloy at Elevated Temperatures. Materials Science and Engineering A. 454â€“455: 357â€“366.
Rice, R. C., Jackson, J. L., Bakuckas, J., Thompson, S. 2012. Metallic Materials Properties Development and Standardization. Scientific Report. Washington DC: Department of Transportation Federal Aviation Administration.
Uematsu, Y., Akita, M., Nakajima, M., Tokaji, K. 2007. Effect of Temperature on High Cycle Fatigue Behaviour in 18Cr-2Mo Ferritic Stainless Steel. International Journal of Fatigue. 30: 642â€“648.
Hong, S. G. Lee, S. B. 2005. Mechanism of Dynamic Strain Aging and Characterization of Its Effect on the Low-Cycle Fatigue Behavior in Type 316L Stainless Steel. Journal of Nuclear Materials. 340: 307â€“314.
Yamada, K., Cao, Q., Okado, N. 2000. Fatigue Crack Growth Measurements Under Spectrum Loading. Engineering Fracture Mechanics. 66: 483â€“497.
Jiujerm, P., ltenberger, I.A. 2007. Effect of Temperature on Cyclic Deformation Behaviour and Residual Stress Relaxation of Deep Rolled Under-aged Aluminium Alloy AA6110. Materials Science and Engineering A. 452â€“453: 475â€“482.
Mohammad, M., Abdullah, S., Jamaludin, N., Nuawi, M. Z. 2012. Correlating Strain and Acoustic Emission Signals of Metallic Component Using Global Signal Statistical Approach. Advanced Materials Research. 445: 1064â€“1069.
How to Cite
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.