materials free full text grain to grain interaction
Study of the interaction of solutes with Σ5 (013) tilt
Substitutional alloying elements significantly affect the recrystallization and austenite-ferrite phase transformation rates in steels. The atomistic mechanisms of their interaction with the interfaces are still largely unexplored. Using density functional theory we determine the segregation energies between commonly used alloying elements and the Σ5 (013) tilt grain boundary in bcc iron.
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Materials 2014 7 304 2. Stability of Rolling Textures Before moving forward it is instructive to briefly review prior work on the stability of grains as
Get PriceOPEN ACCESS materialsResearchGate
Materials 2014 7 304 2. Stability of Rolling Textures Before moving forward it is instructive to briefly review prior work on the stability of grains as
Get PriceGranular Geomechanics ScienceDirect
The book focuses on granular composition and packing grain interactions discrete granular modeling and continuum constitutive modeling. Show less Granular Geomechanics provides a comprehensive exploration of soils as granular materials and the manner in which a soil s engineering properties form grain-scale mechanics.
Get PriceThe interaction of oxygen vacancies with grain boundaries
The diffusion and segregation of oxygen vacancies near a grain boundary in m-HfO 2 is investigated by first principles calculations. We find that both neutral and positive vacancies segregate to the grain boundary. Positive vacancies which are mobile in the bulk with activation energies for diffusion ∼ 0.7 eV have enhanced mobility parallel to the boundary plane but once at the boundary
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Materials 2014 7 304 2. Stability of Rolling Textures Before moving forward it is instructive to briefly review prior work on the stability of grains as
Get PriceColossal grain growth yields single-crystal metal foils by
Nov 30 2018 · Single-crystal metal foils are valuable for their surface properties that allow for synthesis of materials like graphene. Jin et al. present a strategy for creating colossal single-crystal metal foils called "contact-free annealing" (see the Perspective by Rollett). The method relies on hanging and heating commercially available inexpensive cold-rolled metal foils.
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As expected the grain growth is mainly influenced by annealing temperature. For all cold strips the grain size increases with an increase of annealing temperature. A higher deformation also leads to slightly larger grains as shown in Fig. 5 a) and c). Like texture grain
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Sep 01 2020 · Introduction. Crystalline materials with nanotwinned (NT) structures have been studied for several decades. It is well known that NT structures are beneficial for the improvement of strength and plasticity of metallic materials and strengthening superhard materials such as boron nitride and diamond .The mechanical behaviors and properties of NT materials can be optimized by tailoring
Get PriceMaterials Free Full-Text Characterization of Grain
Grain size is an important parameter in evaluating the properties of microstructures in metals. In this paper the attenuation coefficient of Rayleigh waves is introduced to characterize grain size in heat treated 316L stainless steel. Rayleigh wave attenuation is measured using an angle beam wedge transducer as the transmitter and an air-coupled transducer as the receiver.
Get PriceMaterials Free Full-Text The Influence of Grain
Two-phase bimetal composites contain both grain boundaries and bi-phase interfaces between dissimilar crystals. In this work we use a crystal plasticity finite element framework to explore the effects of grain boundary interactions on the plastic stability of bi-phase interfaces. We show that neighboring grain interactions do not significantly alter interface plastic stability during plane
Get PricePushing the boundaries Nature Materials
May 23 2011 · Grain boundaries in polycrystalline graphene are an obstacle to electron transport. However cunning refinements in growth techniques push
Get PriceImpact of the interaction of material production and
As expected the grain growth is mainly influenced by annealing temperature. For all cold strips the grain size increases with an increase of annealing temperature. A higher deformation also leads to slightly larger grains as shown in Fig. 5 a) and c). Like texture grain
Get PriceMaterials Free Full-Text Grain-to-Grain Interaction
A grain is surrounded by grains with different crystal orientations in polycrystalline plain low-carbon steel. The grain is constrained by its adjacent grains in the tension process. The interaction of the grain with the adjacent grains was investigated within the elastic deformation region. The following results have been obtained (1) the Young s modulus of a grain without consideration of
Get PriceHealing of Planar Defects in 2D Materials via Grain
Healing of Planar Defects in 2D Materials via Grain Boundary Sliding. Xiaoxu Zhao. The study highlights the role of the often‐neglected interlayer interactions for defect repair in 2D materials and shows that exploiting these interactions has significant potential for obtaining large‐scale defect‐free 2D films. The full text of
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This chapter discusses the importance of three aspects of grain structure crystallographic texture grain morphology and grain size. Various growth modes and deposition processes such as Frank-van der Merwe or layer-by-layer growth mode Volmer-Weber or island growth mode and Stranski-Krastonov (S-K) growth mode have been discussed.
Get PriceMaterials Science in Microelectronics I ScienceDirect
This chapter discusses the importance of three aspects of grain structure crystallographic texture grain morphology and grain size. Various growth modes and deposition processes such as Frank-van der Merwe or layer-by-layer growth mode Volmer-Weber or island growth mode and Stranski-Krastonov (S-K) growth mode have been discussed.
Get PriceInter-grain interaction in random magnetic anisotropy
Effect of inter-grain exchange interaction on the coercive forces was analyzed with a numerical simulation in magnetic materials with random magnetic anisotropy. The magnetization of an assembly of magnetically interacting grains with randomly oriented uniaxial anisotropy was calculated using the Landau-Lifshitz-Gilbert equation. We supposed a single spin model where the magnetizations in a
Get PriceGrain refinement of magnesium alloys SpringerLink
The literature on grain refinement of magnesium alloys is reviewed with regard to two broad groups of alloys alloys that contain aluminum and alloys that do not contain aluminum. The alloys that are free of aluminum are generally very well refined by Zr master alloys. On the other hand the understanding of grain refinement in aluminum bearing alloys is poor and in many cases confusing
Get PriceA new metric to control nucleation and grain size
A new metric to control nucleation and grain size distribution in hybrid organic–inorganic perovskites by tuning the dielectric constant of the antisolvent† Blaire A. Sorenson ‡ a Lucy U. Yoon ‡ b Eric Holmgren b Joshua J. Choi b and Paulette Clancy a
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Through robust interactions between exposed active sites and PbI 2 the 2D MOFs tightly caps the surface of PbI 2 ‐terminated perovskite grains to stabilize the perovskite phases and aids the adhesion of adjacent grains. The MOFs mainly distributed at the grain boundaries of the perovskite film is directly observed at the microscopic scale.
Get PriceStudy of the interaction of solutes with Σ5 (013) tilt
Substitutional alloying elements significantly affect the recrystallization and austenite-ferrite phase transformation rates in steels. The atomistic mechanisms of their interaction with the interfaces are still largely unexplored. Using density functional theory we determine the segregation energies between commonly used alloying elements and the Σ5 (013) tilt grain boundary in bcc iron.
Get PriceBulk Grain-Boundary Materials from Nanocrystals Chem
We propose a new concept the nanocrystal (NC)-coining process to produce bulk materials with precisely tailored nanoscale grain-boundary conditions. By consolidating surface-engineered NCs into bulk materials using pressure we can fabricate free-standing NC coins with metallic appearance and conductivity while preserving the original NC domain feature. The obtained NC coins show enhanced
Get PriceEffects of Grain Refinement and Predeformation Impact by
Creep testing is conducted on an advanced martensitic‐ferritic creep‐resistant P92 steel (ASME Grade 92) to evaluate the effects of grain refinement and the predeformation impact after processing by severe plastic deformation (SPD) namely by high‐pressure torsion and high‐pressure sliding.
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Grain refinement to the nano/ultrafine-grained regime can make metals several times stronger but this process is usually accompanied by a dramatic loss of ductility. Such strength-ductility trade-off originates from a lack of strain-hardening capacity in tiny grains. Here we present a strategy to regain the strain-hardening ability of high-strength metals by incorporation of extrinsic
Get PriceNanostructural metallic materials Structures and
Sep 01 2020 · Introduction. Crystalline materials with nanotwinned (NT) structures have been studied for several decades. It is well known that NT structures are beneficial for the improvement of strength and plasticity of metallic materials and strengthening superhard materials such as boron nitride and diamond .The mechanical behaviors and properties of NT materials can be optimized by tailoring
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