A5051284757- Metallic Glasses and Amorphous Alloys
- Microstructure and mechanical properties
- Material Dynamics and Properties
- High Entropy Alloys Studies
- Aluminum Alloys Composites Properties
- Glass properties and applications
- nanoparticles nucleation surface interactions
- Phase-change materials and chalcogenides
- High-Temperature Coating Behaviors
- Theoretical and Computational Physics
- Solidification and crystal growth phenomena
- Advanced Materials Characterization Techniques
- Microstructure and Mechanical Properties of Steels
- Aluminum Alloy Microstructure Properties
- Advanced materials and composites
- Magnetic and transport properties of perovskites and related materials
- Additive Manufacturing Materials and Processes
- Metal and Thin Film Mechanics
- High Temperature Alloys and Creep
- Intermetallics and Advanced Alloy Properties
- Rare-earth and actinide compounds
- Shape Memory Alloy Transformations
- Metallurgy and Material Forming
- Advancements in Battery Materials
- Anodic Oxide Films and Nanostructures
University of Münster
2016-2025
Nanjing University of Science and Technology
2017-2024
CeNTech
2009-2024
Ruhr University Bochum
2021
Instituto de Ciencia de Materiales de Sevilla
2013-2019
Shanghai University
2014-2018
Material Sciences (United States)
2015
Institute of Mechanics
2015
Chinese Academy of Sciences
2015
Beijing University of Technology
2014
Severe plastic deformation (SPD) is effective in producing bulk ultrafine-grained and nanostructured materials with large densities of lattice defects. This field, also known as NanoSPD, experienced a significant progress within the past two decades. Beside classic SPD methods such high-pressure torsion, equal-channel angular pressing, accumulative roll-bonding, twist extrusion, multi-directional forging, various continuous techniques were introduced to produce upscaled samples. Moreover,...
Abstract The innovation potential is high for bulk nanostructured materials (BNM) produced by methods of severe plastic deformation and accordingly this report focuses on very recent developments demonstrating the using BNM advanced functional applications in engineering medicine.
We measured glass transition temperatures Tg as a function of the salt concentration in polymer electrolyte systems consisting poly(ethylene oxide) (PEO) complexed either with sodium iodide (NaI) or lithium bis(trifluorosulfonylimide) (LiTFSI). At homologous compositions, PEO–NaI is found to be generally larger than that LiTFSI. The present values are markedly higher previously reported reference data. Also observed nonlinear dependence differs from earlier studies. These findings...
Quantitative density measurements from electron scattering show that shear bands in deformed Al88Y7Fe5 metallic glass exhibit alternating high and low regions, ranging -9% to +6% relative the undeformed matrix. Small deflections of band main propagation direction coincide with switches higher lower than matrix vice versa, indicating faster slower motion (stick slip) occurs during propagation. Nanobeam diffraction analyses provide clear evidence changes are accompanied by structural changes,...
Abstract Metallic surface nanopatterns are prepared by a template‐confined dewetting process with multiple structural controllabilities. The morphology of the building blocks is homogeneous throughout nanopatterns, as proceeds separately in each bowl. features units patterns highly dependent on annealing temperature. Importantly, size and composition nanoparticles can be pre‐calculated designed manipulating thickness evaporated metallic films. heating temperature influence surface‐enhanced...
High entropy alloys (HEAs) have emerged as a new class of multicomponent materials, which potential for high temperature applications. Phase stability and creep deformation, two key selection criteria are predominantly influenced by the diffusion constituent elements along grain boundaries (GBs). For first time, GB Ni in chemically homogeneous CoCrFeNi CoCrFeMnNi HEAs is measured radiotracer analysis using 63Ni isotope. Atom probe tomography confirmed absence elemental segregation at GBs...
The present knowledge on grain boundary-related phenomena specific for severely plastically deformed materials is reviewed and critically analyzed in detail. Severe plastic deformation shown to introduce metastable states of the boundaries which are characterized by enhanced diffusion rates, high-density structure elements large (still localized) elastic strains. An intrinsic heterogeneity deformation-induced modifications revealed examined different scales. Relations between existence...
Abstract The development of high-strength metals has driven the endeavor pushing limit grain size (d) reduction according to Hall-Petch law. But continuous refinement is particularly challenging, raising also problem inverse effect. Here, we show that nanograined (NMs) with d tens nanometers could be strengthened level comparable or even beyond extremely-fine NMs (d ~ 5 nm) attributing dislocation exhaustion. We design Fe-Ni NM intergranular Ni enrichment. results triggering structural...
Abstract Next‐generation thermal management requires the development of low lattice conductivity materials, as observed in ionic conductors. For example, thermoelectric efficiency is increased when decreased. Detrimentally, high leads to device degradation. Battery safety and design also require an understanding transport Ion mobility, structural complexity, anharmonicity have been used explain properties However, are rarely discussed direct comparison. Herein, Ag + argyrodites found change...
Grain boundary complexions in the Hastelloy C-22 are modified to unravel structure–property interplay of grain precipitation (carbides), segregation, and diffusion rates. Annealing treatments used create distinct with specific segregation-precipitation-structure states. Two states were compared: those induced by low- (at 873 K, mainly for segregation) high-temperature 1123 carbide precipitation) annealing treatments. A correlative analytical microscopy–tracer analysis approach is followed...