期刊
BULLETIN OF MATERIALS SCIENCE
卷 24, 期 2, 页码 231-236出版社
INDIAN ACADEMY SCIENCES
DOI: 10.1007/BF02710107
关键词
7475 aluminium alloy; fatigue life; fatigue crack growth; cyclic cleavage; ductile striations
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.
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