Oxygen self-diffusion in forsterite: Implications for the high-temperature creep mechanism

1980 ◽  
Vol 47 (3) ◽  
pp. 391-397 ◽  
Author(s):  
O. Jaoul ◽  
C. Froidevaux ◽  
W.B. Durham ◽  
M. Michaut
Keyword(s):  
High Temperature ◽  
Creep Mechanism ◽  
High Temperature Creep ◽  
Self Diffusion ◽  
Temperature Creep

Effect of Stress on Creep at High Temperatures

1957 ◽  
Vol 24 (2) ◽  
pp. 207-213
Author(s):  
H. Laks ◽  
C. D. Wiseman ◽  
O. D. Sherby ◽  
J. E. Dorn
Keyword(s):  
Activation Energy ◽  
Solid Solution ◽  
High Temperature ◽  
Creep Rate ◽  
Pure Aluminum ◽  
Dislocation Climb ◽  
Experimental Investigations ◽  
High Temperature Creep ◽  
Self Diffusion ◽  
Temperature Creep

Abstract Experimental investigations on pure aluminum and its dilute solid-solution alloys revealed that the high-temperature creep rate ϵ̇ is related to the stress σ by ϵ̇ ∼ σn for low stresses and ϵ̇ ∼ eBσ for high stresses where n and B are constants independent of the creep strain and temperature. According to a preliminary dislocation-climb model for high-temperature creep, the activation energy for creep is that for self-diffusion, the effect of stress on the creep rate depends on the number of active Frank-Read sources, and the rate of climb depends on the structure as determined by the pattern of climbing dislocations. Many of the experimental observations on high-temperature creep can be accounted for by this model.

Determination of Copper Self-Diffusion Coefficients on the Base of High-Temperature Creep Data

2006 ◽  
Vol 249 ◽  
pp. 115-118 ◽  
Author(s):  
Danil V. Vaganov ◽  
Sergei Zhevnenko
Keyword(s):  
High Temperature ◽  
Diffusion Coefficients ◽  
High Temperature Creep ◽  
Creep Data ◽  
Measuring Device ◽  
Self Diffusion ◽  
Temperature Creep ◽  
Self Diffusion Coefficient ◽  
Determination Of Copper

Indirect method is used for determination of copper self-diffusion coefficient on the base of high-temperature creep data. These data are obtained by the use of the new measuring device and assuming that Nabarro-Herring mechanism acts.

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