A5023546214- High Entropy Alloys Studies
- Metallic Glasses and Amorphous Alloys
- High-Temperature Coating Behaviors
- Additive Manufacturing Materials and Processes
- Microstructure and mechanical properties
- Glass properties and applications
- Phase-change materials and chalcogenides
- Metal and Thin Film Mechanics
- Aluminum Alloy Microstructure Properties
- Microstructure and Mechanical Properties of Steels
- Advanced materials and composites
- Surface Treatment and Residual Stress
- Aluminum Alloys Composites Properties
- Adhesion, Friction, and Surface Interactions
- Theoretical and Computational Physics
- High Temperature Alloys and Creep
- Advanced Materials Characterization Techniques
- Diamond and Carbon-based Materials Research
- Railway Engineering and Dynamics
- Boron and Carbon Nanomaterials Research
- Magnetic Properties and Applications
- Solidification and crystal growth phenomena
- Magnetic and transport properties of perovskites and related materials
- Mechanical stress and fatigue analysis
- Metallurgical and Alloy Processes
Erich Schmid Institute of Materials Science
2022-2024
Austrian Academy of Sciences
2022-2024
Montanuniversität Leoben
2022
A deep understanding of the mechanisms controlling shear banding is fundamental importance for improving mechanical properties metallic glasses. Atomistic simulations highlight nanoscale stresses and strains banding, but corresponding experimental proofs are scarce due to limited characterization techniques. Here, by using precession nanodiffraction mapping in transmission electron microscope, atomic density strain distribution an individual band quantitatively mapped at 2 nm resolution. We...
We present a new phase-separated Zr-based metallic glass (MG) composition, free of toxic elements (Ni and Cu) prepared in glass-forming system by alloying addition. The substitution Y Zr70-xAl12.5Fe17.5Yx (x = 0–15 at.%) results phase separation, giving rise to nano-amorphous domains glassy matrix. A homogeneous MG feature is observed for low concentrations up x 5. Microstructure thermal property analysis indicate that the glasses with 10 15 at.% exhibit typical liquid separation-induced...
Tailoring vacancies is a feasible way to improve the mechanical properties of ceramics. However, high concentrations usually compromise strength (or hardness). We show that elasticity and flexural could be achieved simultaneously using nitride superlattice architecture with disordered anion up 50%. Enhanced primarily result from distinctive deformation mechanism in ceramics, i.e., unit-cell disturbances. Such disturbance substantially relieves local high-stress concentration, thus enhancing...
Diffusion plays a significant role in phase formation and transformation solid-state alloys. In order to determine the influence of element diffusion on transition behavior high-entropy alloy (HEA), systematic study reactive Al CoCrFeNi HEA was carried out. It is demonstrated that thermodynamic kinetic effects play coupled evolution HEA, among which effect governs major phases. The direction elements controlled by Gibbs free energy gradient front interface, while sluggish does not dominant...
Abstract Residual stress engineering is widely used in the design of new advanced lightweight materials. For metallic glasses, attention has been given to structural changes and rejuvenation processes. High-energy scanning X-ray diffraction strain mapping reveals large elastic fluctuations notched glasses after deformation under triaxial compression. Microindentation hardness hints at a competing hardening–softening mechanism compression complementary effects structure modulation....
High pressure torsion (HPT) is presented as a new fabrication route to produce bulk Sm–Co magnets with strongly refined microstructure down the nanometer regime. The initial powders, based on compositions SmCo 5 , Sm 2 Co 7 and 17 are compacted subsequently deformed by HPT. microstructural evolution in dependence applied deformation parameters characterized electron microscopy effect of HPT phase stability monitored synchrotron X‐ray diffraction. An increasing amount strain leads stronger...
The phase evolution of alloys is closely related to atomic diffusion. influence reactive diffusion on formation in high-entropy (HEAs) however still unclear. present work systematically investigates the a multicomponent CoCrFeNi/Al couple through isochronous-reactive interdiffusion experiments. This provides direct way study enthalpy and entropy element behavior. At temperatures below 1173 K, contribution dominates total energy, leading intermetallic compounds. When temperature range...
Topologically close-packed (TCP) phases such as Laves are usually considered to harm the mechanical properties of classical superalloys for high-temperature applications. However, if an optimal fraction and size designed, this situation can completely change some compositionally complex alloys (CCA). Based on existing studies austenitic or ferritic steels, we propose in paper a design strategy aimed at exploiting role phase defining wrought CCAs elevated temperatures. We demonstrate its...
Abstract Residual stress engineering is very widely used in the design of new advanced lightweight materials. For metallic glasses attention has been on structural changes and rejuvenation processes. High energy scanning X-ray diffraction strain mapping reveals large elastic fluctuations notched after deformation under triaxial compression. Microindentation hardness hints to a competing hardening-softening mechanism compression further complementary effects structure modulation. Transmission...