The application of surface science to fatigue: The role of surface chemistry and surface modification in fatigue crack initiation in silver single crystals

1992 ◽  
Vol 40 (10) ◽  
pp. 2769-2780 ◽  
Author(s):  
T.S. Shiram ◽  
M.E. Fine ◽  
Y.W. Chung
Keyword(s):  
Surface Modification ◽  
Fatigue Crack ◽  
Crack Initiation ◽  
Surface Chemistry ◽  
Single Crystals ◽  
Surface Science ◽  
Fatigue Crack Initiation

Electron Microscopy Study of Fatigue Crack Initiation in Ni3Al Single Crystals

1988 ◽  
Vol 133 ◽  
Author(s):  
L. M. Hsiung ◽  
N. S. Stoloff
Keyword(s):  
Electron Microscopy ◽  
Fatigue Crack ◽  
Crack Initiation ◽  
Single Crystals ◽  
Room Temperature ◽  
Fatigue Crack Initiation ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Dislocation Loops ◽  
Defect Clusters

ABSTRACTTransmission electron microscopy of single-slip oriented Ni3Al single crystals cyclically deformed at room temperature revealed a high density of dislocation dipoles and point defect clusters. The majority of the defect clusters were identified by weak-beam TEM to be of vacancy type. The observations of circular perfect dislocation loops, Frank loops, and spherical voids revealed the evidence of vacancy condensation during fatigue cycling at room temperature. Together with SEM observations of surface topography, it is suggested that fatigue crack initiation in Ni3Al single crystals can be rationalized by formation of microvoids at PSB/matrix interfaces.

scholarly journals The role of oxidation damage in fatigue crack initiation of an advanced Ni-based superalloy

2015 ◽  
Vol 81 ◽  
pp. 265-274 ◽  
Author(s):  
S. Cruchley ◽  
H.Y. Li ◽  
H.E. Evans ◽  
P. Bowen ◽  
D.J. Child ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Initiation ◽  
Fatigue Crack Initiation ◽  
Oxidation Damage
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