Effects of precrack environment on subsequent corrosion fatigue crack growth behavior of a squeeze-cast aluminum alloy
- Toyama Univ. (Japan). Dept. of Mechanical System Engineering
Corrosion fatigue occurs in all materials exposed to a corrosive environment and subjected to fatigue-type stresses. As in corrosion fatigue cracking, there are several aspects of the problem arising from mechanical, environmental, and metallurgical properties, which affect corrosion fatigue susceptibility. Corrosion fatigue crack propagation behavior will be obviously affected by different precrack conditions. However, studies regarding prefatigue crack environmental effects on subsequent corrosion fatigue crack growth and associated damage mechanisms are lacking to date. The present article gives a corrosion fatigue growth behavior of a through crack artificially obtained for long cracks relating to a different experimental precrack program in the air and the aqueous aggressive environments. A squeeze-cast Al-Si-Mg-Cu aluminum alloy (AC8A-T6) was used in this study. Chemical composition of the alloy is (in wt pct) 12Si-1.1Mg-1.1Cu-1.3Ni and balance Al.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 131488
- Journal Information:
- Metallurgical Transactions, A, Vol. 26, Issue 11; Other Information: PBD: Nov 1995
- Country of Publication:
- United States
- Language:
- English
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