Bulletin of Materials Science

, Volume 24, Issue 2, pp 231–236

Study of fatigue behaviour of 7475 aluminium alloy

  • B. B. Verma
  • J. D. Atkinson
  • M. Kumar
Article

Abstract

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.

Keywords

7475 Aluminium alloy fatigue life fatigue crack growth cyclic cleavage ductile striations 

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Copyright information

© Indian Academy of Sciences 2001

Authors and Affiliations

  • B. B. Verma
    • 1
  • J. D. Atkinson
    • 1
    • 2
  • M. Kumar
    • 1
  1. 1.Department of Metallurgical EngineeringRegional Engineering CollegeRourkelaIndia
  2. 2.School of EngineeringSheffield Hallam UniversitySheffieldUK

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