scholarly journals Effects of Grain-Boundary Sliding and Plastic Deformation of Grains on the Formation of Grain-Boundary Cracks in a Double Cylindrical Bicrystal of a Cu-SiO2 Alloy

2007 ◽  
Vol 48 (6) ◽  
pp. 1412-1416
Author(s):  
Masakazu Seki ◽  
Mitsuru Fujimoto ◽  
Toshiyuki Fujii ◽  
Masaharu Kato ◽  
Susumu Onaka
Keyword(s):  
Plastic Deformation ◽  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Boundary Sliding

The Effect of Grain Boundary State on Deformation Process Development in Nanostructured Metals Produced by the Methods of Severe Plastic Deformation

2011 ◽  
Vol 683 ◽  
pp. 69-79 ◽  
Author(s):  
Evgeny V. Naydenkin ◽  
Galina P. Grabovetskaya ◽  
Konstantin Ivanov
Keyword(s):  
Plastic Deformation ◽  
Grain Boundary ◽  
Severe Plastic Deformation ◽  
Deformation Process ◽  
Process Development ◽  
Grain Boundary Sliding ◽  
Total Deformation ◽  
Nanostructured Metals ◽  
Boundary State ◽  
Boundary Sliding

In this review the investigations of deformation process development are discussed which were carried out by tension and creep in the temperature range Т<0.4Tm (here Тm is the absolute melting point of material) for nanostructured metals produced by the methods of severe plastic deformation. The contribution of grain boundary sliding to the total deformation in the above temperature interval is also considered. An analysis is made of the effect of grain size and grain boundary state on the evolution of grain boundary sliding and cooperative grain boundary sliding in nanostructured metals.

On Mechanisms of “Grain Boundary Sliding”, in Light of the Kaibyshev-Valiev Data on Two Limit “Non-Equilibrium” GB States in Deformed Metallic Materials

2018 ◽  
Vol 385 ◽  
pp. 120-125 ◽  
Author(s):  
Yuriy S. Nechaev
Keyword(s):  
Experimental Data ◽  
Plastic Deformation ◽  
Grain Boundary ◽  
Structural Defect ◽  
Superplastic Deformation ◽  
Amorphous State ◽  
Grain Boundary Sliding ◽  
Metallic Materials ◽  
Boundary Sliding ◽  
Non Equilibrium

Based on the results of the thermodynamic analysis of a number of experimental data, and in the light of the Kaibyshev-Valiev discovery, the possibility of periodic formation of a liquid-like state in the nanoregions of extremely "non-equilibrium" grain boundaries and in other structural defect regions in metallic polycrystals during their superplastic deformation and intense plastic deformation is considered. It is also considered important differences between the liquid-like state and the glass-like (amorphous) state.

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