Effect of residual stresses induced by cold expansion on the crack growth in 6082 aluminum alloy

2013 ◽  
Vol 99 ◽  
pp. 159-168 ◽  
Author(s):  
Z. Semari ◽  
A. Aid ◽  
A. Benhamena ◽  
A. Amrouche ◽  
M. Benguediab ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Residual Stresses ◽  
Crack Growth ◽  
Cold Expansion ◽  
6082 Aluminum Alloy

Effect of Split-Sleeve Cold Expansion on the Fatigue Life of 7050-T7451 Aluminum Alloy

2014 ◽  
Vol 1082 ◽  
pp. 403-407 ◽  
Author(s):  
Hong Huang ◽  
Qing Yun Zhao ◽  
Feng Lei Liu
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Residual Stresses ◽  
Transgranular Fracture ◽  
Alloy Plate ◽  
Cold Expansion ◽  
Compressive Stresses ◽  
Aluminum Alloy Plate ◽  
Relationship Of ◽  
The Relationship

Split-sleeve cold expansion processing was employed on the 7050-T7451 aluminum alloy plate. Fatigue lives were compared according different expansion, then the relationship of fatigue life and expansion was analyzed. Residual stresses were measured with different expansion, and the fatigue fractograph was analyzed by SEM. The results show that the split-sleeve cold expansion can obtain longer life compared with the non-strengthen hole. When over the optimum expansion, fatigue life began to decrease. The maximum fatigue life increased to 2.92 times with 4.1% expansion. The maximum values of radial residual stresses grew with expansion. The depths of residual compressive stresses were more than 6mm with 2.6% and 4.1% expansion. The fatigue fractograph shows mixed transgranular fracture.

A crack-growth arresting technique in aluminum alloy

2008 ◽  
Vol 15 (4) ◽  
pp. 302-310 ◽  
Author(s):  
Anggit Murdani ◽  
Chobin Makabe ◽  
Akihide Saimoto ◽  
Ryouji Kondou
Keyword(s):  
Aluminum Alloy ◽  
Crack Growth
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