A5021802420- Microstructure and mechanical properties
- Microstructure and Mechanical Properties of Steels
- Aluminum Alloy Microstructure Properties
- Metallurgy and Material Forming
- Metal Forming Simulation Techniques
- Composite Material Mechanics
- High Temperature Alloys and Creep
- Aluminum Alloys Composites Properties
- Advanced Materials Characterization Techniques
- Numerical methods in engineering
- Advanced ceramic materials synthesis
- Advanced Surface Polishing Techniques
- Fatigue and fracture mechanics
- Hydrogen embrittlement and corrosion behaviors in metals
- High-Velocity Impact and Material Behavior
- Solidification and crystal growth phenomena
- Material Properties and Applications
- Powder Metallurgy Techniques and Materials
- Advanced Mathematical Modeling in Engineering
- Fusion materials and technologies
- Ultrasonics and Acoustic Wave Propagation
- Magnesium Alloys: Properties and Applications
- Metal and Thin Film Mechanics
- Engineering and Materials Science Studies
- Material Properties and Failure Mechanisms
University of Manchester
2018-2023
Henry Royce Institute
2021-2023
United Kingdom Atomic Energy Authority
2023
Max-Planck-Institut für Nachhaltige Materialien
2012-2022
North Carolina State University
2011-2022
RWTH Aachen University
2015-2021
Institute for Advanced Study
2015-2021
Max Planck Society
2012-2020
Crystal Plasticity (CP) modeling is a powerful and well established computational materials science tool to investigate mechanical structure–property relations in crystalline materials. It has been successfully applied study diverse micromechanical phenomena ranging from strain hardening single crystals texture evolution polycrystalline aggregates. However, when considering the increasingly complex microstructural composition of modern alloys their exposure to—often harsh—environmental...
There are several facets of aluminum when it comes to sustainability. While helps save fuel due its low density, producing from ores is very energy-intensive. Recycling shifts the balance towards higher sustainability, because energy needed melt scrap only about 5% that consumed in ore reduction. The amount available for recycling estimated double by 2050. This offers an opportunity bring metallurgical sector closer a circular economy. A challenge large amounts post-consumer scrap,...
Abstract Single crystal Ni-based superalloys have long been an essential material for gas turbines in aero engines and power plants due to their outstanding high temperature creep, fatigue oxidation resistance. A turning point was the addition of only 3 wt.% Re second generation single which almost doubled creep lifetime. Despite significance this improvement, mechanisms underlying so-called “Re effect” remained controversial. Here, we provide direct evidence enrichment crystalline defects...
Although magnesium alloys deform extensively through shear strains and crystallographic re-orientations associated with the growth of twins, little is known about strengthening mechanisms this deformation mode. A crystal plasticity based phase field model for twinning employed in work to study resulting from interaction between twin precipitates. The full-field simulations reveal great detail pinning de-pinning a boundary at individual precipitates, maximum resistance when precipitate...
This work presents a crystal plasticity model for dynamic precipitation in aluminium alloys. It takes into account both the influence of an evolving precipitate distribution on critical stress dislocation glide, and accelerating effect deformation kinetics. The precipitates behaviour is integrated constitutive law. kinetics modelled spatio-temporally using multi-class kinetic (KWN) incorporating through accelerated solute diffusion caused by production excess vacancies. applied to growth...
The grain boundary (GB) microchemistry and precipitation behaviour in high-strength Al-Zn-Mg-Cu alloys has an important influence on their mechanical electrochemical properties. Simulation of the GB segregation, precipitation, solute distribution these requires accurate description thermodynamics kinetics this multi-component system. CALPHAD databases have been successfully developed for equilibrium thermodynamic calculations complex systems, recent years combined with diffusion simulations....
This work presents a model for deformation enhanced precipitate growth and coarsening kinetics in pre-aged 7xxx aluminium alloys under warm forming conditions (100 to 200 °C). A multi-class Kampmann–Wagner framework is used describe the evolution of size distribution, where effect incorporated through solute diffusivity resulting from induced excess vacancies. classical phenomenological accumulation The validated with experimental data literature, applied investigate wide range predict...
Large area, time resolved, in-situ optical scanning of constant displacement (four-point bend) tests has been used to monitor the environmentally assisted cracking (EAC) initiation and crack growth behaviour AA7085 AA7449 T7651 thick plate materials, exposed warm-humid air (50 % RH & 70 °C). Subsequent fractography revealed dominant sites originating at surface connected gas pore clusters, in combination with reactive Mg-containing constituent intermetallic compounds co-located on grain...
The mechanical properties and stress corrosion cracking (SCC) resistance of 7xxx series aluminium alloys are significantly affected by the composition distribution precipitates formed during heat treatment. In particular, their quench sensitivity is related to formation η-phase that nucleate heterogeneously on grain boundaries at lower cooling rates after solution treatment, which has been a key factor restricting gauge hot rolled plates in aerospace industry. To better understand effects...
Fe–TiB2 metal matrix composites, termed high modulus steels, have great potential for lightweight design applications due to their stiffness/density ratio. However, the observed embrittlement, caused by TiB2 particles, critically limits application of these steels. Experimental studies identify influence particle microstructure on ductility and toughness are complex in view multitude parameters affecting microstructural damage. We therefore pursue instead an integrated computational...
Abstract Electroplasticity is defined as the reduction in flow stress of a material undergoing deformation on passing an electrical pulse through it. The lowering during pulsing has been attributed to combination three mechanisms: softening due Joule-heating material, de-pinning dislocations from paramagnetic obstacles, and electron-wind force acting dislocations. However, there no consensus literature regarding relative magnitudes reductions resulting each these mechanisms. In this paper,...
Combined atomic-scale characterization and simulation reveal the complexity diversity of chemical nature dislocations.