Jesús Galán López

Jesús Galán López
Delft University of Technology | TU · Department of Materials Science and Engineering (MSE)

About

22
Publications
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232
Citations

Publications

Publications (22)
Article
Full-text available
This article details the ESAFORM Benchmark 2021. The deep drawing cup of a 1 mm thick, AA 6016-T4 sheet with a strong cube texture was simulated by 11 teams relying on phenomenological or crystal plasticity approaches, using commercial or self-developed Finite Element (FE) codes, with solid, continuum or classical shell elements and different conta...
Article
Full-text available
This work presents an advanced crystal plasticity model for the simulation of the mechanical behavior of multiphase advanced high-strength steels. The model is based on the Visco-Plastic Self-Consistent (VPSC) model and uses information about the material’s crystallographic texture and grain morphology together with a grain constitutive law. The la...
Article
It is generally known that the crystallographic texture of metal alloys is formed during subsequent solid-state transformations, occurring during manufacturing of the product. Applied to the specific case of metal sheet manufacturing, it implies that the texture of the finished product is the result of the crystallographic phenomena involved in hot...
Article
Full-text available
Two of the microstructural parameters most influential in the properties of polycrystalline materials are grain size and crystallographic texture. Although both properties have been extensively studied and there are a wide range of analysis tools available, they are generally considered independently, without taking into account the possible correl...
Article
Full-text available
Crystal plasticity models attempt to reproduce the complex deformation processes of polycrystalline metals based on a virtual representation of the real microstructure. When choosing this representation, a compromise must be made between level of detail at the local level and statistical significance of the aggregate properties, also taking into ac...
Article
Full-text available
The third generation of advanced high strength steels shows promising properties for automotive applications. The macroscopic mechanical response of this generation can be further improved by a better understanding of failure mechanisms on the microstructural level and micro-mechanical behavior under various loading conditions. In the current study...
Article
Bainitic steels, as a third generation of advanced high strength steels, are potential steel grades for automotive applications. Two grades of bainitic steels with low and high silicon content, with three different thermal treatments per grade and therefore different second phase constituents, are examined under quasi-static and high strain rate de...
Article
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Plastic deformation of metallic materials is an inherently anisotropic process as a result of the presence of preferential orientations in their crystallographic texture. Crystal plasticity modeling, which allows simulating the response of polycrystal aggregates taking into account their texture and other microstructural parameters, has been extens...
Article
Full-text available
Multiphase bainitic steels, as a third generation of advanced high strength steels, show promising properties for automotive applications. Understanding the micro-mechanisms of damage initiation during plastic deformation is a key to further mechanical properties enhancement. The topological effect of martensite as a second phase constituent on loc...
Article
Full-text available
Recently, the third generation of advanced high strength steels (AHSSs) show promising properties for automotive applications. The improvement of macroscopic mechanical performance is not feasible without a deep understanding of the micromechanical behavior and failure micro-mechanisms involved during its response under various loading conditions....
Article
In this article, the capacity of the Visco-Plastic Self-Consistent model (VPSC) as a constitutive model for the simulation of cold-rolled Ti–6Al–4V under a diverse set of loading conditions is investigated. The model uses information about the material crystallographic texture and grain morphology obtained with EBSD together with a grain constituti...
Article
Full-text available
The strain rate dependence of the plastic yield and failure properties displayed by most metals affects energies, forces and forming limits involved in high speed forming processes. In this contribution a technique is presented to assess the influence of the strain rate on the forming properties of Ti6Al4V sheet. In a first step, static and dynamic...
Article
Full-text available
The use of finite element simulations has become one of the main tools of the mechanical engineer. The method is applied to the analysis and design of engineering structures, the study of manufacturing processes and even to perform virtual experiments. Traditionally, the constitutive laws chosen for finite element analysis have been as simple as po...
Article
Full-text available
The goal of this study is to apply an elastic viscoplastic self-consistent crystal plasticity model to predict the texture evolution in a Ti-6Al-4V alloy which has a (mainly) hexagonal crystal structure. The model under consideration is an extension of the viscoplastic self-consistent model proposed by Lebensohn and Tome [1993] which has been adapt...
Article
Full-text available
A new algorithm for the solution of the deformation of a polycrystalline material using a self-consistent scheme, and its integration as part of the finite element software Abaqus/Standard are presented. The method is based on the original VPSC formulation by Lebensohn and Tomé and its integration with Abaqus/Standard by Segurado et al. The new alg...
Thesis
Full-text available
Crystal plasticity models are a very valuable tool for the study of polycrystalline materials (and, notably, metals), due to their capacity to correlate the mechanical behaviour of the material with its microstructure. However, the complexity and high computational cost of these techniques make difficult to combine these advanced models with common...
Article
An in-depth analysis of the effect of heat generated by plastic work on the observed tensile behaviour of Ti­6Al­4V at different strain rates is presented. Special emphasis is put on the transition from isothermal to adiabatic conditions and how this transition is affected by several process parameters such as material properties, environmental con...
Article
It is common that energy absorbing structural elements are subjected to a number of loading cycles before a crash event. Several studies have shown that previous fatigue can significantly influence the tensile properties of some materials, and hence the behaviour of structural elements made of them. However, when the capacity of absorbing energy of...
Article
Full-text available
The car industry is facing pressure because of the growing demand for more fuel-efficient passenger cars. In order to limit energy consumption and air pollution the weight of the carbody has to be reduced. At the same time, high levels of safety have to be guaranteed. In this situation, the choice of material becomes a key decision in car design. A...
Chapter
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The mechanical response of a material is most often assessed without taking any possible previous damage into account. However, a fresh condition is exceptional when the material is actually used. Moreover, it has been proved that a preceding cyclic loading has a significant influence on the mechanical properties of some materials, and hence on the...
Article
Full-text available
Although the effect of high and low temperatures on the mechanical properties of Ti-6Al-4V has already been extensively studied, extreme temperatures are usually considered in these investigations. Instead, the present work focuses on a range of temperatures not far from room conditions. This particular range of temperatures is important not only b...
Article
Full-text available
The response of engineering structures to loads is most often assessed without taking possible damage of the used material(s) into account. However, it has already been proved that a preceding cyclic loading and the alteration of the microstructure it causes, can have a significant influence on the mechanical properties of steel grades and aluminiu...

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Projects

Projects (3)
Project
The project goal is to optimize the microstructures with bainitic matrix in order to improve the cold formability and edge-cracking behavior of advanced high-strength steels with high yield strength. This will enable more efficient steel applications, like weight reduction without loss of formability, enhanced energy absorption due to high yield strength, higher elongation and favorable crash folding behavior due to improved bending properties