Study of fatigue behaviour of 7475 aluminium alloy
- 331 Downloads
Fatigue properties of a thermomechanically treated 7475 aluminium alloy have been studied in the present investigation. The alloy exhibited superior fatigue life compared to conventional structural aluminium alloys and comparable stage II crack growth rate. It was also noticed that the fatigue crack initiated from a surface grain and the crack extension was dominated by ductile striations. Analysis also revealed that this alloy possessed fracture toughness and tensile properties superior to that noticed with other structural aluminium alloys. Therefore the use of this alloy can safely reduce the overall weight of the aircraft.
Keywords7475 Aluminium alloy fatigue life fatigue crack growth cyclic cleavage ductile striations
Unable to display preview. Download preview PDF.
- Buratti M, Russo E Di and Giordano G 1986Aluminium technology, conf. proc. (ed) T Sheppard (London: Inst. of Metals) p. 468Google Scholar
- Osgood C C 1982Fatigue design (New York: Pergamon Press) 2nd ed p. 439Google Scholar
- Suresh S 1996Fatigue of materials (Cambridge: Cambridge University Press) pp. 119 and 209Google Scholar
- Tokaji K and Ogawa T 1992in Short fatigue crack (eds) K J Miller and E R de los Rios (London: Mech. Engg.) p. 85Google Scholar
- Truckner W G, Staley J T, Bucci R J and Thakker A B 1979 AFMT-TR-76-169Google Scholar
- Verma B B 1997TCT report (Sheffield: Sheffield Hallam University)Google Scholar
- Zehnder J 1996 inAluminium: Technology, application, and environment, a profile of a modern metal (ed) Dietrich G Altenpohl (Pennsylvania: TMS Warrendale) p. 319Google Scholar