scholarly journals Lithium/yttrium cluster effect on {101¯1} twin boundary migration in magnesium

2021 ◽  
pp. 104611
Author(s):  
Shuo Wang ◽  
Qun Zu
Keyword(s):  
Twin Boundary ◽  
Boundary Migration ◽  
Cluster Effect

scholarly journals Twin boundary migration in an individual platinum nanocrystal during catalytic CO oxidation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jérôme Carnis ◽  
Aseem Rajan Kshirsagar ◽  
Longfei Wu ◽  
Maxime Dupraz ◽  
Stéphane Labat ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Twin Boundary ◽  
Density Functional ◽  
Boundary Migration ◽  
Catalyst Design ◽  
Crystal Defects ◽  
Three Dimensions ◽  
Platinum Nanoparticle ◽  
Structural Characterisation

AbstractAt the nanoscale, elastic strain and crystal defects largely influence the properties and functionalities of materials. The ability to predict the structural evolution of catalytic nanocrystals during the reaction is of primary importance for catalyst design. However, to date, imaging and characterising the structure of defects inside a nanocrystal in three-dimensions and in situ during reaction has remained a challenge. We report here an unusual twin boundary migration process in a single platinum nanoparticle during CO oxidation using Bragg coherent diffraction imaging as the characterisation tool. Density functional theory calculations show that twin migration can be correlated with the relative change in the interfacial energies of the free surfaces exposed to CO. The x-ray technique also reveals particle reshaping during the reaction. In situ and non-invasive structural characterisation of defects during reaction opens new avenues for understanding defect behaviour in confined crystals and paves the way for strain and defect engineering.

The diffusive character of extension twin boundary migration in magnesium

Materialia ◽  
2018 ◽  
Vol 2 ◽  
pp. 208-213 ◽  
Author(s):  
Xiao-Zhi Tang ◽  
Qun Zu ◽  
Ya-Fang Guo
Keyword(s):  
Twin Boundary ◽  
Boundary Migration

Observation of twin boundary migration in copper during deformation

2004 ◽  
Vol 372 (1-2) ◽  
pp. 173-179 ◽  
Author(s):  
D.P. Field ◽  
B.W. True ◽  
T.M. Lillo ◽  
J.E. Flinn
Keyword(s):  
Twin Boundary ◽  
Boundary Migration

Mechanism of Stress-Driven Grain Boundary Migration in Nanotwinned Materials

2018 ◽  
Vol 55 (1) ◽  
pp. 21-25 ◽  
Author(s):  
N.V. Skiba
Keyword(s):  
Theoretical Model ◽  
Grain Boundary ◽  
Twin Boundary ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
High Angle ◽  
Twin Boundaries ◽  
Critical Stresses ◽  
Ultrafine Grained ◽  
Ultrafine Grained Materials

Abstract Stress-driven grain boundary (GB) migration in ultrafine-grained materials with nanotwinned structure is theoretically described. In the framework of the theoretical model, the stress-driven high-angle GB migration is accompanied by migration of twin boundaries which adjoin this GB. Energetic characteristics and critical stresses of the GB migration accompanied by the twin boundary migration are calculated.

scholarly journals Plastic Deformation Behavior of Bi-Crystal Magnesium Nanopillars with a { 10 1 ¯ 2 } Twin Boundary under Compression: Molecular Dynamics Simulations

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 750
Author(s):  
Xiaoyue Yang ◽  
Shuang Xu ◽  
Qingjia Chi
Keyword(s):  
Molecular Dynamics ◽  
Plastic Deformation ◽  
Molecular Dynamics Simulations ◽  
Twin Boundary ◽  
Basal Slip ◽  
Boundary Migration ◽  
Plastic Deformation Process ◽  
Plastic Deformation Behavior ◽  
Schmid Factor ◽  
Dynamics Simulations

In this study, molecular dynamics simulations were performed to study the uniaxial compression deformation of bi-crystal magnesium nanopillars with a { 10 1 ¯ 2 } twin boundary (TB). The generation and evolution process of internal defects of magnesium nanopillars were analyzed in detail. Simulation results showed that the initial deformation mechanism was mainly caused by the migration of the twin boundary, and the transformation of TB into (basal/prismatic) B/P interface was observed. After that, basal slip as well as pyramidal slip nucleated during the plastic deformation process. Moreover, a competition mechanism between twin boundary migration and basal slip was found. Basal slip can inhibit the migration of the twin boundary, and { 10 1 ¯ 1 } ⟨ 10 1 ¯ 2 ⟩ twins appear at a certain high strain level ( ε = 0.104). In addition, Schmid factor (SF) analysis was conducted to understand the activations of deformation modes.

Incoherent twin boundary migration induced by ion irradiation in Cu

2013 ◽  
Vol 113 (2) ◽  
pp. 023508 ◽  
Author(s):  
N. Li ◽  
J. Wang ◽  
Y. Q. Wang ◽  
Y. Serruys ◽  
M. Nastasi ◽  
...  
Keyword(s):  
Twin Boundary ◽  
Ion Irradiation ◽  
Boundary Migration

Kinetics of twin boundary migration in YBa2Cu3O7−x single crystals

1992 ◽  
Vol 203 (3-4) ◽  
pp. 342-346 ◽  
Author(s):  
L.A. Dorosinskii ◽  
V.I. Nikitenko ◽  
A.A. Polyanski ◽  
V.K. Vlasko-Vlasov ◽  
A. Roytburd ◽  
...  
Keyword(s):  
Single Crystals ◽  
Twin Boundary ◽  
Boundary Migration ◽  
Kinetics Of

Reversible twin boundary migration between α″ martensites in a Ti-Nb-Zr-Sn alloy

2017 ◽  
Vol 688 ◽  
pp. 169-173 ◽  
Author(s):  
Tingting Yao ◽  
Kui Du ◽  
Haoliang Wang ◽  
Lu Qi ◽  
Suyun He ◽  
...  
Keyword(s):  
Twin Boundary ◽  
Boundary Migration

scholarly journals In situ TEM study of twin boundary migration in sub-micron Be fibers

2015 ◽  
Vol 96 ◽  
pp. 57-65 ◽  
Author(s):  
F. Mompiou ◽  
M. Legros ◽  
C. Ensslen ◽  
O. Kraft
Keyword(s):  
Twin Boundary ◽  
Boundary Migration ◽  
In Situ Tem
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