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Batteries: Modeling Tomorrow's Materials Today (Sodium-ion Batteries)

Batteries: Modeling Tomorrow's Materials Today (Sodium-ion Batteries)
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Daniel Schneider , Manuel Dillenz , Nora Burgard , Lukas Fridolin Pfeiffer , Jan Martin , Britta Nestler , Mohsen Sotoudeh , Cornelius Gauckler , Peter Axmann , Simon Daubner , Institute Of Nanotechnology , Group Leader , Institute For Applied Materials , Center Materials In Technical , Hydrogen Research Baden , Solar Energy , Life Sciences , Karlsruhe Institute Of Technology , Ulm University , Simulations Reveal Strong Influence , Elastic Deformation , Charging Behavior , Layered Oxides Used , Karlsruhe Institute , Computational Materials , Applied Materials ,

"In-situ neutron and synchrotron methods for the investigation of plast" by Klaus Dieter Liss

Following a crash course in neutron and synchrotron diffraction standards, applications are demonstrated on selected metallic systems, comprising the atomic order in titanium aluminide intermetallics at thermal and mechanical processing. High pressure torsion processed specimens show heterogeneous structure and order. Upon heating, their nanostructure evolves revealing regimes of recovery, recrystallization and grain growth, which can be exploited for engineering designated microstructures with enhanced physical and mechanical properties. Advanced analysis of two-dimensional diffractograms by synchrotron radiation allows to distinguish microstructure transformations as well as deformation mechanisms in thermo-mechanical processing. The methods are applicable to a wide range of materials and processes allowing to speed up materials development by orders of magnitude. ....

Diffraction Theory , Ynamic Recrystallization , High Pressure Torsion , Win Situ , Neutron Scattering , Phase Transformation , Elastic Deformation , Eciprocal Space , Synchrotron Radiation , Thermo Mechanical Processing , Itanium Aluminides ,

"Hydrogen-Induced Dislocation Nucleation and Plastic Deformation of 〈00" by Jiaqing Li, Ziyue Wu et al.

The grain boundary (GB) plays a crucial role in dominating hydrogen-induced plastic deformation and intergranular failure in polycrystal metals. In the present study, molecular dynamics simulations were employed to study the effects of hydrogen segregation on dislocation plasticity of a series of symmetrical tilt grain boundaries (STGBs) with various hydrogen concentrations. Our study shows that hydrogen both enhances and reduces dislocation nucleation events from STGBs, depending on different GB structures. Specifically, for (Formula presented.) STGBs, hydrogen does not affect the mode of heterogeneous dislocation nucleation (HDN), but facilitates nucleation events as a consequence of hydrogen disordering the GB structure. Conversely, hydrogen retards dislocation nucleation due to the fact that hydrogen segregation disrupts the transformation of boundary structure such as Σ9 ((Formula presented.)) (Formula presented.) STGB. These results are helpful for deepening our understanding of ....

Dislocation Nucleation , Hydrogen Embrittlement , Molecular Dynamics , Elastic Deformation ,

"A review on plastic deformation induced surface/interface roughening o" by Ning Nie, Lihong Su et al.

With the increasing demand for light weight design in industries such as aerospace and automotive, sheet metallic materials with high strength and low density have been intensively manufactured and widely applied. However, plastic deformation induced surface roughening is an undesirable and a practically unavoidable phenomenon for sheet metallic materials and becomes the subject of great attention in recent years. The evolution of surface roughening plays important roles in the strain limit of the deformation and also significantly influences the product quality and application. This paper provides a comprehensive overview of both experimental and numerical modelling contributions to understand the surface roughening behaviour of sheet metallic materials during various plastic deformation and manufacturing processes. It has been found that roughening of the free surface or necking of the interface is induced by grain scale strain heterogeneity and strongly dependent on the strain the m ....

Numerical Modelling , Elastic Deformation , Sheet Metal , Surface Roughening ,