Results 21 to 30 of about 8,939 (232)

Field-theoretic approach for characterization the deformation of multicomponent polycrystalline materials

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013
Most of inorganic structural materials (metallic alloys, ceramics, minerals etc.) are polycrystalline aggregates, consisted of macroscopically large quantity of single-crystal grains (crystallites).
Anatoliy A Tashkinov   +1 more
doaj   +1 more source

Topological and metrical aspects of normal and abnormal grain growth

open access: yesMaterials Research, 2007
Grain growth theories normally describe a grain using the concept of ‘grain radius’. However, this assumption bypasses all topological information relating to the grain, viz., the number of its faces, edges, etc. This study, by contrast, introduces a new
Paulo Rangel Rios, Martin Eden Glicksman
doaj   +1 more source

Modeling structures of cellular materials for application at various length-scales [PDF]

open access: yesComputer Methods in Materials Science, 2013
The paper presents the spectrum of methods and results for design of structures, which are frequently applied in numerical simulations of properties and processes taking place in cellular materials.
Tomasz Wejrzanowski   +3 more
doaj   +1 more source

The Dislocation Mechanics of Crystal/Polycrystal Plasticity

open access: yesCrystals, 2022
A brief history and update are given in four examples demonstrating that polycrystals are generally stronger than their individual component crystal grains because of obstructed dislocation pile-ups at grain boundaries.
Ronald W. Armstrong
doaj   +1 more source

Incremental homogenization approach for ageing viscoelastic polycrystals [PDF]

open access: yes, 2012
An approximate self-consistent modelling is proposed to estimate the effective viscoelastic response of polycrystals presenting an ageing constitutive behaviour. This approach makes use of the equivalence between the Dirichlet series approximation of the
Renaud Masson   +5 more
core   +1 more source

A Compact Ultrafast Electron Diffractometer with Relativistic Femtosecond Electron Pulses

open access: yesQuantum Beam Science, 2020
We have developed a compact relativistic femtosecond electron diffractometer with a radio-frequency photocathode electron gun and an electron lens system.
Jinfeng Yang   +4 more
doaj   +1 more source

MESOSCALE DEFORMATION-INDUCED SURFACE PHENOMENA IN LOADED POLYCRYSTALS [PDF]

open access: yes, 2021
The paper reviews the results of numerical analyses for the micro-and mesoscale deformation-induced surface phenomena in three-dimensional polycrystals with the explicit account for the grain structure.
Romanova, Varvara   +2 more
core   +1 more source

Toward Material Property Extraction from Dynamic Spherical Indentation Experiments on Hardening Polycrystalline Metals

open access: yesMetals, 2023
Static indentation and dynamic indentation are reviewed, with a focus on extraction of material properties of isotropic strain-hardening polycrystalline metals that may be rate- and temperature-sensitive. Static indentation is reviewed first, followed by
John D. Clayton   +3 more
doaj   +1 more source

Evaluation of dielectric and piezoelectric behavior of unpoled and poled barium titanate polycrystals with oxygen vacancies using phase field method

open access: yesInternational Journal of Smart and Nano Materials, 2016
This article studies the dielectric and piezoelectric behavior of unpoled and poled barium titanate (BaTiO3) polycrystals with oxygen vacancies. A phase field model is employed for BaTiO3 polycrystals, coupled with the time-dependent Ginzburg–Landau ...
Fumio Narita   +2 more
doaj   +1 more source

Industrial potential of additive manufacturing of transparent ceramics: A review

open access: yesOpen Ceramics
Transparent ceramics is a unique class of materials, with performance comparable to single crystals, but a high process flexibility given by ceramic technology.
Andrea Volfi   +4 more
doaj   +1 more source

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