Rapid method for low cycle fatigue properties: thickness effect on the fatigue crack initiation life of welded joints

2015 ◽  
Vol 38 (12) ◽  
pp. 1492-1506 ◽  
Author(s):  
J. Raujol-Veillé ◽  
D. Thévenet ◽  
C. Doudard ◽  
S. Calloch ◽  
H. Minnebo
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Rapid Method ◽  
Welded Joints ◽  
Low Cycle Fatigue ◽  
Fatigue Crack Initiation ◽  
Thickness Effect ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Crack Initiation Life

Low Cycle Fatigue and Fracture Behavior of Nickel-Base Superalloy CM247LC at 760°C

2004 ◽  
Vol 449-452 ◽  
pp. 561-564 ◽  
Author(s):  
Seong Moon Seo ◽  
In Sup Kim ◽  
Chang Yong Jo
Keyword(s):  
Fatigue Crack ◽  
Low Cycle Fatigue ◽  
Fatigue Crack Initiation ◽  
Strain Range ◽  
Initiation Site ◽  
Coarse Grained ◽  
Fatigue Properties ◽  
Nickel Base Superalloy ◽  
Cycle Fatigue ◽  
Fine Grained

Low cycle fatigue (LCF) behavior of coarse and fine grained superalloy CM247LC at 760°C has been investigated. Both coarse and fine grained CM247LC showed similar cyclic stress response, however, the fine grained CM247LC specimen exhibited relatively uniform and superior fatigue properties to the coarse grained one. It was found that fatigue crack initiation of the alloy was keen to the applied strain range. Fatigue crack initiated at the surface of the specimen with high strain range (∆εt≥( 0.7%) while the initiation site moved to the internal defects at low strain range (∆εt≤0.6%).

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