The Role of Grain Boundary Curvature in Diffusional Deformation: Control of Grain Boundary Sliding by Grain Boundary Mobility

2020 ◽  
Author(s):  
Francis Delannay
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Boundary Mobility ◽  
Deformation Control ◽  
Grain Boundary Mobility ◽  
Boundary Sliding ◽  
Boundary Curvature

Role of Grain Boundary Sliding in Texture Evolution for Nanoplasticity

2017 ◽  
Vol 20 (4) ◽  
pp. 1700212 ◽  
Author(s):  
Yajun Zhao ◽  
Laszlo S. Toth ◽  
Roxane Massion ◽  
Werner Skrotzki
Keyword(s):  
Grain Boundary ◽  
Texture Evolution ◽  
Grain Boundary Sliding ◽  
Boundary Sliding

The role of a shear planar mesodefect in the nucleation of a crack at a grain junction due to athermal grain boundary sliding

2021 ◽  
Vol 11 (4) ◽  
pp. 467-472
Author(s):  
Vladimir Perevezentsev ◽  
Sergey Kirikov ◽  
Julia Svirina
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Boundary Sliding

Role of a Shear Planar Mesodefect in Nucleation of Crack at Grains Junction Due to Athermal Grain Boundary Sliding

2021 ◽  
Author(s):  
V.N. Perevezentsev ◽  
S.V. Kirikov ◽  
J.V. Svirina
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Boundary Sliding

The Role of Diffusion Accommodation and Phase Boundary Wetting in the Deformation Behaviour of Ultrafine Grained Sn-Pb Eutectic

2010 ◽  
Vol 297-301 ◽  
pp. 1002-1009 ◽  
Author(s):  
Faina Muktepavela ◽  
R. Zabels
Keyword(s):  
Grain Boundary ◽  
Diffusion Processes ◽  
Deformation Behaviour ◽  
Grain Boundary Sliding ◽  
Ultrafine Grained ◽  
Interphase Boundaries ◽  
Boundary Sliding ◽  
High Homologous Temperature ◽  
Microscopy Techniques

Mechanical properties, microstructure of the Sn–38wt. %Pb eutectic and the development of deformation - induced diffusion processes on interphase boundaries (IB) were investigated. Experiments were carried out both in deformed and annealed states of eutectic using micro- and nanoindentation, SEM, AFM and optical microscopy techniques. It was found that the deformation of the annealed alloy is localized at the Pb/Sn interphase boundaries and occurs by grain boundary sliding (GBS) accompanied by sintering micropore processes under the action of the capillary forces on the Pb/Sn IB. During severe plastic deformation of Sn-Pb eutectic phase transition in the Sn grain boundary occurs. This deformation-induced process takes place due to the wetting of tin with Pb. These diffusion accommodation processes (sintering and wetting) are facilitated by the low values of the Pb/Sn interphase energy (0.07 J/m2). Wetting is thermodynamically favourable because the condition γgb > 2 γib is satisfied and it is also kinetically allowed due to the relatively high homologous temperature (> 0.5•Tm). The obtained values of the nanohardness and elastic modulus evidence that the IBs in the Sn–Pb eutectic have to be considered as a separate quasi-phase with its own properties.

The role of grain-boundary sliding in the creep of polycrystals

1976 ◽  
Vol 24 (8) ◽  
pp. 725-729 ◽  
Author(s):  
M.V. Speight
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Boundary Sliding

Role of Vacancies and Solute Atoms on Grain Boundary Sliding

1999 ◽  
Vol 601 ◽  
Author(s):  
J.S. Vetrano ◽  
C.H. Henager ◽  
E.P. Simonen
Keyword(s):  
Grain Boundary ◽  
Solute Atom ◽  
Vacancy Concentration ◽  
Grain Boundary Sliding ◽  
Fine Grained ◽  
Grain Boundary Plane ◽  
Transmission Electron ◽  
Boundary Sliding ◽  
Solute Atoms

AbstractIt is necessary for grain boundary dislocations to slide and climb during the grain boundary sliding process that dominates fine-grained superplastic deformation. The process of climb requires either an influx of vacancies to the grain boundary plane or a local generation of vacancies. Transmission electron microscopy (TEM) observations of grain boundaries in superplastically deformed Al-Mg-Mn alloys quenched under load from the deformation temperature have revealed the presence of nano-scale cavities resulting from a localized supersaturation of vacancies at the grain boundary. Compositional measurements along interfaces have also shown an effect of solute atoms on the local structure. This is shown to result from a coupling of vacancy and solute atom flows during deformation and quenching. Calculations of the localized vacancy concentration indicate that the supersaturation along the grain boundary can be as much as a factor often. The effects of the local supersaturation and solute atom movement on deformation rates and cavity nucleation and growth will be discussed.

Role of local curvature in grain boundary sliding in a deformed polycrystal

2013 ◽  
Vol 16 (4) ◽  
pp. 335-347 ◽  
Author(s):  
D. D. Moiseenko ◽  
V. E. Panin ◽  
T. F. Elsukova
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Local Curvature ◽  
Boundary Sliding
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