A5090070853- Aluminum Alloy Microstructure Properties
- Microstructure and mechanical properties
- Aluminum Alloys Composites Properties
- Magnesium Alloys: Properties and Applications
- Microstructure and Mechanical Properties of Steels
- Solidification and crystal growth phenomena
- Advanced Materials Characterization Techniques
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- High Temperature Alloys and Creep
- Metallurgical and Alloy Processes
- Advanced ceramic materials synthesis
- Numerical methods in engineering
- Advanced Welding Techniques Analysis
- Image and Signal Denoising Methods
- Metal and Thin Film Mechanics
- Block Copolymer Self-Assembly
- Metallurgy and Material Forming
- Composite Material Mechanics
- Image Processing Techniques and Applications
- Elasticity and Material Modeling
- Materials Engineering and Processing
- MXene and MAX Phase Materials
- Fatigue and fracture mechanics
Max-Planck-Institut für Nachhaltige Materialien
2017-2025
Max Planck Society
2017-2020
Shanghai Jiao Tong University
2017-2019
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,...
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...
Twin, dislocation, and grain boundary interaction in hexagonal materials, such as Mg, Ti, Zr, has critical influence on the materials' mechanical properties. The development of a microstructure-sensitive constitutive model for these deformation mechanisms is key to design high-strength ductile alloys. In this work, we have developed formulation within finite strain framework modeling dislocation slip- twinning-induced plasticity. A density-based crystal plasticity was employed describe...
Tensile twinning is a main deformation mode in hexagonal close packed structure metals, so it important to comprehensively understand mechanisms which are not fully disclosed using 2D or small volume 3D characterization techniques. A large area electron backscatter diffraction (EBSD) measurement and crystal plasticity modeling were carried out investigate the tensile behaviors magnesium (Mg) alloy. The results showed that activity was underestimated conventional EBSD scans. When compressed...
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....
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...
Abstract The complex interplay between chemistry, microstructure, and behavior of many engineering materials has been investigated predominantly by experimental methods. Parallel to the increase in computer power, advances computational modeling methods have resulted a level sophistication which is comparable that experiments. At continuum level, one class such models based on thermodynamics, phase-field methods, crystal plasticity, facilitating account multiple physical mechanisms...
Abstract Material sustainability requires energy‐efficient and rapid strengthening processes. In alloys, through diffusion‐driven precipitation is limited by the low vacancy concentration, with fewer than one per 100 billion lattice sites at room temperature in metals such as aluminum iron under thermodynamic equilibrium. Artificially increasing concentrations 1 to 7 orders of magnitude above equilibrium levels quenching, irradiation, or deformation can significantly accelerate material...
The electrochemical properties of high strength 7xxx aluminium alloys strongly depend on the substitutional occupancy Zn by Cu and Al in strengthening η-phase with two-sublattice structure, its microstructural compositional prediction is key to design new generation corrosion resistant alloys. In this work, we have developed a chemical-potential-based phase-field model capable describing multi-component ordered phases, during commercial multi-stage artificial ageing treatments, directly...
The rates of atomic clustering and precipitation hardening are closely related to the diffusivity solutes concentration vacancies during natural aging aluminum alloys. measurement at room temperature, especially in systems with an equilibrium vacancy concentration, is beneficial design process. However, this has long been challenging because extremely low diffusion temperature presence supersaturated vacancies. In work, we propose a method quantify based on kinetic evaluation spinodal...
A chemo-mechanical model for a finite-strain elasto-viscoplastic material containing multiple chemical components is formulated and an efficient numerical implementation developed to solve the resulting transport relations. The solution relies on inverting constitutive potential. In this work, semi-analytical inversion general family of multi-component regular-solution free energy models derived. This based splitting into convex contribution, treated implicitly, non-convex explicitly....
Abstract Laves phases such as CaMg 2 (C14), Ca(Al,Mg) (C36), and CaAl (C15) have high melting points, hardness at room elevated temperatures, but are inherently brittle. Cast Mg–Al–Ca alloys having phase skeleton thus good creep properties limited ductility. An understanding of the co-deformation behaviour α-Mg is essential for further improving mechanical performance these alloys. Here, we study a Mg–4.65Al–2.82Ca alloy using micropillar compression in matrix, α-Mg/C36 α-Mg/C15 interfaces...
Predicting process–structure and structure–property relationships are the key tasks in materials science engineering. Central to both research directions is internal material structure. In case of metallic for structural applications, this structure, microstructure, collective ensemble all equilibrium nonequilibrium lattice imperfections. Continuum models derive based on two ingredients: 1) quantitative state variables that capture essential features material's 2) kinetic equations describe...
Solid-state Li-ion batteries, utilizing Ni-rich oxide cathodes, hold promise for high-energy electrochemical storage. However, Li intercalation-induced dimensional changes can lead to crystal defect formation in these and contact mechanics problems between cathode solid electrolyte. Understanding the interplay microstructure, operating conditions, micromechanics of battery materials, capacity decay remains a challenge. Here, we present microstructure-sensitive chemo-mechanical model study...
Solid-state Li-ion batteries, utilizing Ni-rich oxide cathodes, hold promise for high-energy electrochemical storage. However, Li intercalation-induced dimensional changes can lead to crystal defect formation in these and contact mechanics problems between cathode solid electrolyte. Understanding the interplay microstructure, operating conditions, micromechanics of battery materials, capacity decay remains a challenge. Here, we present microstructure-sensitive chemo-mechanical model study...
Tensile twinning is a main deformation mode in hexagonal close packed structure metals, so it important to comprehensively understand mechanisms which are not fully disclosed using 2D or small volume 3D characterization techniques. A large area electron backscatter diffraction (EBSD) measurement and crystal plasticity modeling were carried out investigate the tensile behaviors Mg alloy. The results showed that activity was underestimated conventional EBSD scans. When compressed yield point,...
The rates of atomic clustering and precipitation hardening are closely related to the diffusivity solutes concentration vacancies during natural aging aluminum alloys. Measuring at room temperature, especially in systems with an equilibrium vacancy concentration, benefits design process. However, this measurement has long been challenging due extremely low diffusion temperature presence supersaturated vacancies. In work, we propose a method quantify based on kinetic evaluation spinodal...