A5069047765- Microstructure and mechanical properties
- High Temperature Alloys and Creep
- Fatigue and fracture mechanics
- Microstructure and Mechanical Properties of Steels
- Aluminum Alloy Microstructure Properties
- nanoparticles nucleation surface interactions
- Metallurgy and Material Forming
- Aluminum Alloys Composites Properties
- Electronic Packaging and Soldering Technologies
- Fusion materials and technologies
- Advanced Materials Characterization Techniques
- Material Properties and Failure Mechanisms
- Metal Forming Simulation Techniques
- Solidification and crystal growth phenomena
- Metallurgical Processes and Thermodynamics
- Numerical methods in engineering
- Metal and Thin Film Mechanics
- Electron and X-Ray Spectroscopy Techniques
- Mechanical stress and fatigue analysis
- High-Velocity Impact and Material Behavior
- Ultrasonics and Acoustic Wave Propagation
- Advanced Surface Polishing Techniques
- Metal Alloys Wear and Properties
- Magnetic Properties and Applications
- Composite Material Mechanics
University of Stuttgart
2013-2024
Applied Materials (Germany)
2019
This study investigates the influences of four different microstructure morphologies on calculation fatigue crack initiation cycle number for 9Cr-1Mo (P91) under cyclic loading conditions at room temperature. Understanding critical influence behavior material durability necessitates examining two principal morphologies: irregular microstructures with inhomogeneous and homogeneous grain shapes, which were generated using Voronoi Tessellation (VT) method. Finite Element Method (FEM)...
This paper uses a two-scale material modeling approach to investigate fatigue crack initiation and propagation of the X10CrMoVNb9-1 (P91) under cyclic loading at room temperature. The Voronoi tessellation method was implemented generate an artificial microstructure model level, then, finite element (FE) applied identify different stress distributions. distributions for multiple microstructures analyzed by using physically based Tanaka–Mura estimate number cycles initiation. Considering...
Abstract An atomistic Monte Carlo simulation of coherent precipitation on a body-centred cubic crystal lattice is presented. A binary system with atom types and B considered, while the ‘diffusion’ atoms realized via vacancy mechanism. Starting random distribution 91 % 9 atoms, formation growth precipitates simulated at constant temperature 773 K. As result simulation, precipitate radii distributions different states time evolution mean have been calculated. The results are compared...
Abstract The mechanical behaviour of steels is strongly related to their underlying atomistic structures which evolve during thermal treatment. Cu-alloyed α-Fe undergoes a change in material the ageing process, especially at temperatures above 300°C, where precipitates form on large time-scale within matrix, yielding first precipitation strengthening material. As grow further time, strength decreases again. This complex process modelled with multiscale approach, combining Kinetic Monte Carlo...
Abstract A multiscale modelling approach is presented that sequentially connects in total five simulation methods via parameter transfers order to capture the macroscopic damage behaviour due an underlying nano structure of copper precipitates bcc iron. In this approach, information on precipitation states taken from kinetic Monte‐Carlo and Phasefield simulations as well experimental data. Based a calibration Dislocation Dynamics by Molecular testing conditions known experiments, with...
A kinetic Monte Carlo approach is used to study the influence of Cr, Fe, Al, or Mg addition on precipitation in a Cu–Ni–Si alloy. The simulation method based vacancy diffusion model. crucial parameters this are pairwise mixing energies all contained elements which determined by ab initio calculations. number dissolved atoms equilibrium state estimate electrical conductivity. In order alloying strength calculations misfit strain at Si interface performed. atomistic (AKMC) simulations reveal...
Realistic material modelling is at the heart of accurate reliability prognosis electronics hardware by means Finite Element (FE) calculations. It usually achieved on basis testing using standardized samples, where well defined, homogeneous stress states and loading conditions can be realized. Both deformation behaviour in initial state, as materials degradation during repetitive then mapped calibrated damage mechanics FE-models. Such models employ calculation internal state variables...
Solder joints in automotive electronic assemblies are exposed to thermomechanical and vibrational loads. Usually, passive thermal cycling results loads the low strain rate plastic creep regime of solder alloy. In case loads, high deformations interconnections expected. order investigate deformation failure behavior material regime, we performed several cycle fatigue (HCF) experiments on standardized specimens a SnAgCu alloy under varying mean stresses ambient temperatures. As first step,...
Abstract An atomistic Monte Carlo simulation of coherent precipitation on a body-centred cubic crystal lattice is presented. A binary system with atom types and B considered, while the ‘diffusion’ atoms realized via vacancy mechanism. Starting random distribution 91% 9% atoms, formation growth precipitates simulated at constant temperature 773 K. As result simulation, precipitate radii distributions different states time evolution mean have been calculated. The results are compared...