Fatigue Behavior of Ultrafine-Grained 5052 Al Alloy Processed Through Different Rolling Methods

2017 ◽  
Vol 26 (6) ◽  
pp. 2826-2836 ◽  
Author(s):  
K. K. Yogesha ◽  
Amit Joshi ◽  
R. Jayaganthan
Keyword(s):  
Fatigue Behavior ◽  
Al Alloy ◽  
Ultrafine Grained

Thermal stability in bulk cryomilled ultrafine-grained 5083 Al alloy

2006 ◽  
Vol 37 (3) ◽  
pp. 721-730 ◽  
Author(s):  
Indranil Roy ◽  
Manish Chauhan ◽  
Farghalli A. Mohamed ◽  
Enrique J. Lavernia
Keyword(s):  
Thermal Stability ◽  
Al Alloy ◽  
Ultrafine Grained ◽  
5083 Al Alloy

LOW CYCLE FATIGUE BEHAVIOR OF Zn-22Al ALLOY IN SUPERPLASTIC REGION AND NON-SUPERPLASTIC REGION

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5477-5482 ◽  
Author(s):  
ATSUMICHI KUSHIBE ◽  
TSUTOMU TANAKA ◽  
YORINOBU TAKIGAWA ◽  
KENJI HIGASHI
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Crack Tip ◽  
The Other ◽  
Al Alloy ◽  
Cycle Fatigue ◽  
Secondary Cracks

The crack propagation properties for ultrafine-grained Zn -22 wt % Al alloy during low cycle fatigue (LCF) in the superplastic region and the non-superplastic region were investigated and compared with the corresponding results for several other materials. With the Zn - 22 wt % Al alloy, it was possible to conduct LCF tests even at high strain amplitudes of more than ±5%, and the alloy appeared to exhibit a longer LCF lifetime than the other materials examined. The fatigue life is higher in the superplastic region than in the non-superplastic region. The rate of fatigue crack propagation in the superplastic region is lower than that in the other materials in the high J-integral range. In addition, the formation of cavities and crack branching were observed around a crack tip in the supereplastic region. We therefore conclude that the formation of cavities and secondary cracks as a result of the relaxation of stress concentration around the crack tip results in a reduction in the rate of fatigue crack propagation and results in a longer fatigue lifetime.

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