Martin Diehl

Martin Diehl
KU Leuven | ku leuven · Department of Materials Engineering and Department of Computer Science

Dr.-Ing.

About

155
Publications
73,383
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,854
Citations
Additional affiliations
October 2020 - present
KU Leuven
Position
  • Professor (Assistant)
Description
  • Computational Materials Science
June 2019 - December 2019
University of California, Los Angeles
Position
  • Researcher
April 2019 - September 2020
Max-Planck-Institut für Eisenforschung GmbH
Position
  • Group Leader
Description
  • Integrated Computational Materials Engineering
Education
June 2011 - June 2015
RWTH Aachen University
Field of study
  • Materials Science
October 2005 - October 2010
Technische Universität München
Field of study
  • Mechanical Engineering

Publications

Publications (155)
Article
Full-text available
Predicting microstructure and (micro-)texture evolution during thermo-mechanical processing requires the combined simulation of plastic deformation and recrystallization. Here, a simulation approach based on the coupling of a full-field dislocation density based crystal plasticity model and a cellular automaton model is presented. A regridding/reme...
Article
Full-text available
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 in computational modeling methods have resulted in a level of sophistication which is comparable to that of experiments. At the continuu...
Article
Damage in metallic materials usually originates at grain boundaries where deformation leads to local strain incompatibility and stress concentration. Characteristics of a grain boundary affects its tendency to damage, but a quantitative understanding is still lacking. In this work, we utilize machine learning to predict grain boundaries susceptible...
Article
Full-text available
Physics-based crystal plasticity models rely on certain statistical assumptions about the collective behavior of dislocation populations on one slip system and their interactions with the dislocations on the other slip systems. One main advantage of using such physics-based constitutive dislocation models in crystal plasticity kinematic frameworks...
Article
Full-text available
The capability of high-resolution modeling of crystals subjected to large plastic strain is essential in predicting many important phenomena occurring in polycrystalline materials, such as microstructure, deformation localization and in-grain texture evolution. However, due to the heterogeneity of the plastic deformation in polycrystals, the simula...
Article
Full-text available
Lath martensite is a complex hierarchical compound structure that forms during rapid cooling of carbon steels from the austenitic phase. At the smallest, i.e., `single crystal’ scale, individual, elongated domains, form the elemental microstructural building blocks: the name-giving laths. Several laths of nearly identical crystallographic orientati...
Article
Full-text available
open access links: https://link.springer.com/article/10.1007%2Fs11661-020-05947-2 https://rdcu.be/b6P8O https://doi.org/10.1007/s11661-020-05947-2 This is a viewpoint paper on recent progress in the understanding of the microstructure–property relations of advanced high-strength steels (AHSS). These alloys constitute a class of high-strength, for...
Article
Full-text available
A severe obstacle for the routine use of crystal plasticity models is the effort associated with determining their constitutive parameters. Obtaining these parameters usually requires time-consuming micromechanical tests that allow probing of individual grains. In this study, a novel, computationally efficient, and fully automated approach is intro...
Article
Full-text available
The demand for heavy-gauge steel plates for use in the large structures has been increasing steadily. Controlled rolling is an effective method of both increasing the strength of steel plates and improving their toughness. Techniques for controlling the texture of polycrystalline materials are very important because texture distribution has a stron...
Article
Full-text available
The influence of grain shape and crystallographic orientation on the global and local elastic and plastic behaviour of strongly textured materials is investigated with the help of full-field simulations based on texture data from electron backscatter diffraction (EBSD) measurements. To this end, eight different microstructures are generated from ex...
Article
Full-text available
Predicting process–structure and structure–property relationships are the key tasks in materials science and engineering. Central to both research directions is the internal material structure. In the case of metallic materials used for structural applications, this internal structure, the microstructure, is the collective ensemble of all equilibri...
Article
Full-text available
Primary static recrystallization is a restoration process during which the critically strong deformed microstructure is atomistically reconstructed into a polycrystal with orders of magnitude lower defect density. Advances in diffraction methods catalyzed research activities directed towards more accurate understanding of recrystallization. While t...
Article
We present a new approach to predict the evolution of anisotropic yield functions by coupling large scale forming simulations with crystal plasticity-spectral based virtual experiments, realizing a multi-scale model for metal forming. Employing a fast spectral method solver enables us to conduct on-the-fly full-field virtual experiments to evolve t...
Article
Full-text available
Although magnesium alloys deform extensively through shear strains and crystallographic reorientations associated with the growth of twins, little is known about the strengthening mechanisms associated with this deformation mode. A crystal plasticity based phase field model for twinning is employed in this work to study the strengthening mechanisms...
Preprint
Full-text available
Although magnesium alloys deform extensively through shear strains and crystallographic re-orientations associated with the growth of twins, little is known about the strengthening mechanisms associated with this deformation mode. A crystal plasticity based phase field model for twinning is employed in this work to study the strengthening mechanism...
Chapter
Full-text available
The local and global behavior of materials with internal microstructure is often investigated on a (representative) volume element. Typically, periodic boundary conditions are applied on such “virtual specimens” to reflect the situation in the bulk of the material. Spectral methods based on Fast Fourier Transforms (FFT) have been established as a p...
Article
Full-text available
Low-alloyed steels with body-centered cubic crystal structure are a material class that is widely used for sheet metal forming applications. When having an adequate crystallographic texture and microstructure, their mechanical behavior is characterized by an isotropic in-plane flow behavior in combination with a low yield strength. The decisive pro...
Article
Full-text available
https://damask.mpie.de Editor's choice: https://www.sciencedirect.com/science/article/pii/S0927025618302714?via%3Dihub 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 to study...
Article
Full-text available
The correct copyright line for this article is “The Author(s) 2017. This article is an open access publication”, rather than “The Minerals, Metals & Materials Society 2017” (as in the original HMTL version of the article).
Article
Phase-field studies of solid-state precipitation under strong chemo-mechanical coupling are performed and benchmarked against the existing analytical solutions. The open source software packages OpenPhase and DAMASK are used for the numerical studies. Solutions for chemical diffusion and static mechanical equilibrium are investigated individually f...
Preprint
Full-text available
Handbook of Mechanics of Materials Editor-in-chief: Hsueh, Chun-Hway Schmauder, S., Chen, C.-S., Chawla, K.K., Chawla, N., Chen, W., Kagawa, Y. (Eds.) ISBN 978-981-10-6885-0 The local and global behavior of materials with internal microstructures is often investigated on a (representative) volume element. Typically, periodic boundary conditions...
Presentation
Full-text available
The solution of a continuum mechanical boundary value problem requires a constitutive response that connects deformation and stress at each material point. Such connection can be regarded as three separate hierarchical problems. At the top-most level, partitioning of the (mean) boundary values of the material point among its microstructural constit...
Article
Dual-phase steels are characterized by high level of mechanical properties and thereby are used in automotive industry for the components with responsible applications. They are not leaders in the wide spectrum of used high-strength steels, but their potential is not completely used yet. The paper presents development of damage mechanisms of the co...
Conference Paper
Full-text available
A coupled experimental-numerical approach is used to investigate the strain partitioning in microstructures of high-strength steels. The comparison between calculated and measured strain fields reveals significant deviations in some regions of the microstructure; these deviations can be explained by the missing subsurface microstructure in the simu...
Article
Dualphasenstähle werden aufgrund ihrer mechanischen Eigenschaften im Automobilbau für sicherheitskritische Bauteile verwendet. Obwohl sie die ersten in großem Umfang eingesetzten hochfesten Stähle sind, ist ihr Potenzial nicht ausgeschöpft. Am Max-Planck-Institut für Eisenforschung (MPIE) in Düsseldorf werden deshalb die Schädigungsmechanismen dies...
Article
Full-text available
Modern high-performing structural materials gain their excellent properties from the complex interactions of various constituent phases, grains, and subgrain structures that are present in their microstructure. To further understand and improve their properties, simulations need to take into account multiple aspects in addition to the composite nat...
Book
Full-text available
Microstructures of metallic structural materials have become increasingly complex, incorporating typically more than one microstructural feature to adjust the material properties according to specific needs. To predict the behaviour of such complex materials, the underlying effects like interaction of different phases, hardening of slip systems, tw...
Article
We present a virtual laboratory to investigate the anisotropic yield behavior of polycrystalline materials by using high resolution crystal plasticity simulations. Employing a fast spectral method solver enables us to conduct a large number of full-field virtual experiments with different stress states to accurately identify the yield surface of th...
Article
We present a study on the plastic deformation of single crystalline stochastic honeycombs under in-plane compression using a crystal plasticity constitutive description for face-centered cubic (fcc) materials, focusing on the very early stage of plastic deformation, and identifying the interplay between the crystallographic orientation and the cell...
Presentation
Full-text available
Presentation of the paper ”Crystal plasticity study of monocrystalline stochastic honeycombs under in-plane compression” on Acta Materialia, Volume 103, Pages 796-808.
Article
Full-text available
In this study, we focus on the interplay between the honeycomb structure and the crystallographic orientation. Specifically, the in-plane Young's moduli of monocrystalline stochastic honeycombs are calculated by a numerical and an analytical approach. The in-plane Young's moduli of the honeycombs were calculated numerically using a solution scheme...
Article
Full-text available
We use a physically-based crystal plasticity model to predict the yield strength of body-centered cubic (bcc) tungsten single crystals subjected to uniaxial loading. Our model captures the thermally-activated character of screw dislocation motion and full non-Schmid effects, both of which are known to play critical roles in bcc plasticity. The mode...
Article
Full-text available
Understanding and improving the mechanical properties of tungsten is a critical task for the materials fusion energy program. The plastic behavior in body-centered cubic (bcc) metals like tungsten is governed primarily by screw dislocations on the atomic scale and by ensembles and interactions of dislocations at larger scales. Modeling this behavio...
Article
Full-text available
The mechanical response of multiphase metallic materials is governed by the strain and stress partitioning behavior among their phases, crystals, and subgrains. Despite knowledge about the existence of these complex and long-ranging interactions, the experimental characterization of such materials is often limited to surface observations of microst...
Data
Steels are humankind’s most important structural materials, enabling technology breakthroughs in various fields, such as energy, transportation, safety, and infrastructure. Profound progress in these fields has been achieved through the development of advanced high-strength steels (AHSS), fueled by the conflicting demands on the automotive industry...
Data