OS1221 Orientation dependence of dislocation structure near fracture surfaces of fatigued copper single crystals

2013 ◽  
Vol 2013 (0) ◽  
pp. _OS1221-1_-_OS1221-2_
Author(s):  
Yoshihisa KANEKO ◽  
Hironori KANBE
Keyword(s):  
Single Crystals ◽  
Dislocation Structure ◽  
Orientation Dependence ◽  
Fracture Surfaces ◽  
Copper Single Crystals

Parameters of Dislocation Structure and Work Hardening of Ni3Ge

2004 ◽  
Vol 842 ◽  
Author(s):  
N. A. Koneva ◽  
Yu.V. Solov'eva ◽  
V. A. Starenchenko ◽  
E. V. Kozlov
Keyword(s):  
Single Crystals ◽  
Yield Stress ◽  
Dislocation Structure ◽  
Temperature Anomaly ◽  
Friction Stress ◽  
Orientation Dependence ◽  
Compression Tests ◽  
Quantitative Measurements ◽  
Different Temperatures ◽  
Scalar Dislocation Density

ABSTRACTOrientation dependence of the yield stress temperature anomaly in Ni3Ge single crystals with the L12 structure was investigated during compression tests. The measurements were carried out in the 4.2 K-1000 K temperature interval for two orientations of single crystals, [001] and [234]. The dislocation structure was studied by TEM. Quantitative measurements of different parameters of dislocation structure were carried out. The values of the scalar dislocation density, ρ, were determined for different temperatures in the deformation interval from the yield stress up to fracture. Temperature dependence of the friction stress τF (T) and the interdislocation interaction parameter α(T) were also obtained. The change in the fraction of straight dislocations as a function of temperature was analyzed.

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