Grain size of plagioclase of the basaltic andesite dikes, Iritono, central Abukuma plateau

1977 ◽  
Vol 14 (8) ◽  
pp. 1860-1866 ◽  
Author(s):  
Yukio Ikeda
Keyword(s):  
Grain Size ◽  
Thermal Diffusion ◽  
Basaltic Andesite ◽  
Diffusion Processes ◽  
Crystallization Time ◽  
Basaltic Magmas

The width (W) of plagioclase crystallizing from magmas is given by the equation log [Formula: see text] where t is the crystallization time calculated from Jaeger's model and η is the viscosity of a magma. The values log 2η−1/3 for basaltic and granitic magmas under hydrous and anhydrous conditions are −0.1 and −1.0 for basaltic magmas, and −1.5 and −3.5 for granitic magmas, respectively. The equation can be explained by coarsening, thermal diffusion, and (or) material diffusion processes.

Dissipation of mechanical energy in a deformable solid during thermal-diffusion processes

1973 ◽  
Vol 5 (1) ◽  
pp. 1-6
Author(s):  
Ya. S. Podstrigach ◽  
R. N. Shvets ◽  
V. S. Pavlina ◽  
Ya. I. Dasyuk
Keyword(s):  
Thermal Diffusion ◽  
Diffusion Processes ◽  
Mechanical Energy ◽  
Deformable Solid

Mechanical-thermal diffusion processes in the surface layer of a plate in application of a eutectic coating

1988 ◽  
Vol 24 (2) ◽  
pp. 114-119
Author(s):  
A. R. Gachkevich ◽  
V. M. Golubets ◽  
B. I. Gornyi ◽  
O. N. Makarenko
Keyword(s):  
Surface Layer ◽  
Thermal Diffusion ◽  
Diffusion Processes ◽  
Eutectic Coating

A Creep Model for Solder Alloys

2011 ◽  
Vol 133 (4) ◽  
Author(s):  
Yongchang Lee ◽  
Cemal Basaran
Keyword(s):  
Grain Size ◽  
Strain Rate ◽  
Diffusion Processes ◽  
Dislocation Motion ◽  
Creep Model ◽  
Solder Alloys ◽  
Creep Models ◽  
And Diffusion ◽  
Cycling Loading

Demand for long-term reliability of electronic packaging has lead to a large number of studies on viscoplastic behavior of solder alloys. Various creep models for solder alloys have been proposed. They range from purely empirical to mechanism based models where dislocation motion and diffusion processes are taken into account. In this study, most commonly used creep models are compared with the test data and implemented in ABAQUS to compare their performance in cycling loading. Finally, a new creep model is proposed that combines best features of many models. It is also shown that, while two creep models may describe the same material stress–strain rate curves equally well, they may yield very different results when utilized for cycling loading. One interesting observation of this study is that the stress exponent, n., also depends on the grain size.

Specific Features of Statistical Analysis for Grain Nanostructures Formed by Solid-State Diffusion at Annealing

2021 ◽  
Vol 316 ◽  
pp. 527-532
Author(s):  
Alexey Stolbovsky
Keyword(s):  
Grain Size ◽  
Statistical Analysis ◽  
Standard Deviation ◽  
Solid State ◽  
Diffusion Processes ◽  
Average Crystallite Size ◽  
Solid State Diffusion ◽  
Mean Values ◽  
State Diffusion ◽  
Standard Distribution

Analysis of structure of Nb3Sn layers, formed by solid-state diffusion in Nb/Cu-Sn composites, has been carried out, using statistical analysis methods. The three different statistical models of grain size distributions, which consist of both a single logarithmic standard distribution and a combination of a logarithmic and a standard distribution with scale factors were considered. It was shown that, during the formation and further evolution of the structure by solid-state diffusion processes, there is a strong correlation between the average crystallite sizes and their deviations from mean values. The dependence of the standard deviation on the average crystallite size, calculated from parameters of logarithmic distribution, falls on the straight line with small deviations. Taking into consideration the relationship between the parameters of grain size distribution, one can conclude that an approximation with the model which involves the dependence between standard deviation of the standard distribution and the logarithmic one provides better accuracy, despite a little bit worse fitting quality of the experimental distributions.

Sign in / Sign up

Export Citation Format

Share Document