Searched for: author%3A%22Kestens%2C+L.A.I.%22
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Habraken, Anne Marie (author), Aksen, Toros Arda (author), Alves, José L. (author), Amaral, Rui L. (author), Chandola, Nitin (author), Corallo, Luca (author), Engel, Bernd (author), Esener, Emre (author), Galan Lopez, J. (author), Kestens, L.A.I. (author)
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...
journal article 2022
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Kestens, L.A.I. (author), Nguyen-Minh, Tuan (author), Petrov, R.H. (author)
The present paper investigates the role of parent phase topology on a crystallographic variant selection rule. This rule assumes that product phase nuclei appear at certain grain boundaries in the parent structure, such that a specific crystallographic orientation relationship is observed with both parent grains at either side of the grain...
journal article 2022
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Galan Lopez, J. (author), Shakerifard, B. (author), Ochoa Avendaño, J.F. (author), Kestens, L.A.I. (author)
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...
journal article 2021
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Galan Lopez, J. (author), Kestens, L.A.I. (author)
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...
journal article 2021
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Shakerifard, B. (author), Galan Lopez, J. (author), Kestens, L.A.I. (author)
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...
journal article 2020
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Azimi, M. (author), Toroghinejad, M. R. (author), Shamanian, M. (author), Kestens, L.A.I. (author)
Ni aluminides have technologically attracted much attention as oxidation protective layers on Ni-superalloys for high-temperature and harsh environments applications as well as for reinforcements in metal-matrix composites. Among the Ni aluminides, the AlNi compound exhibits the best combination of oxidation-protective characteristics and...
journal article 2019
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Lanjewar, Harishchandra A. (author), Naghdy, Soroosh (author), Kestens, L.A.I. (author), Verleysen, Patricia (author)
Manufacturing of ultrafine-grained (UFG) or nanocrystalline (NC) metals via a single step top-down approach imposing severe plastic deformation (SPD) is one of the most promising ways to achieve superior properties such as high strength and superplastic forming capability. Nonetheless, the lack of relevant data on their post-SPD performance...
journal article 2019
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Ghodrat, S. (author), Kalra, Aakarshit (author), Kestens, L.A.I. (author), Riemslag, A.C. (author)
In previous work on the thermo-mechanical fatigue (TMF) of compacted graphite iron (CGI), lifetimes measured under total constraint were confirmed analytically by numerical integration of Paris’ crack-growth law. In current work, the results for CGI are further validated for spheroidal cast iron (SGI), while TMF tests at different constraint...
journal article 2019
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Lopez Covaleda, E.A. (author), Ghodrat, S. (author), Kestens, L.A.I. (author), Sacre, Charles Henry (author), Pardoen, Thomas (author)
Compacted graphite iron is the material of choice for engine cylinder heads of heavy-duty trucks. Compacted graphite iron provides the best possible compromise between optimum mechanical properties, compared to flake graphite iron, and optimum thermal conductivity, compared to spheroidal graphite iron. The vermicular-shaped graphite particles...
journal article 2018
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Galan Lopez, J. (author), Kestens, L.A.I. (author)
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...
journal article 2018
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Shakerifard, B. (author), Galan Lopez, J. (author), Hisker, F. (author), Kestens, L.A.I. (author)
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...
journal article 2018
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Naghdy, Soroosh (author), Pirgazi, Hadi (author), Verleysen, Patricia (author), Petrov, R.H. (author), Kestens, L.A.I. (author)
International Union of Crystallography. The aim of this paper is to examine the morphological and crystallographic anisotropy that develops during high-pressure torsion (HPT) processing. Commercially pure aluminium was subjected to monotonic HPT deformation at room temperature. The microstructure and texture were studied by large-area electron...
journal article 2017
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Azimi, Monireh (author), Toroghinejad, Mohammad Reza (author), Shamanian, Morteza (author), Kestens, L.A.I. (author)
In the present work, the influence of strain on phase formation at the Al/Ni interface was investigated during cold roll bonding and annealing. A sandwich sample composed of an Al-Ni-Al stack was cold rolled with reductions in the range of 50% to 90%, followed by annealing at 450 °C for 60 min. The crystallography of the annealed sandwich...
journal article 2017
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Ghodrat, S. (author), Riemslag, A.C. (author), Kestens, L.A.I. (author)
Orientation contrast microscopy (i.e., electron backscattered diffraction, EBSD) was employed to monitor the plastic strain in loaded tensile samples of aluminium alloy Al6061 in T4 condition. The kernel average misorientation (KAM) is known to be an appropriate parameter in orientation contrast microscopy which has the potential to characterise...
journal article 2017
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Kestens, L.A.I. (author), De Knijf, Dorien (author), Castro Cerda, F. (author), Petrov, R.H. (author)
Texture and microstructure formation during annealing of a 75% cold rolled AHS steel, reheated at a rate of 10°C/s to ~3000°C/s were studied with the purpose to investigate the interaction between the recrystallization and the austenite formation as well as the possibility of grain refinement. It was found that at ultra-high heating rates, the...
journal article 2017
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Martinez Lombardia, Esther (author), Lapeire, Linsey (author), Maurice, Vincent (author), De Graeve, Iris (author), Klein, Lorena (author), Marcus, Philippe (author), Verbeken, Kim (author), Kestens, L.A.I. (author), Gonzalez Garcia, Y. (author), Mol, J.M.C. (author), Terryn, H.A. (author)
When aiming for an increased and more sustainable use of metals a thorough knowledge of the corrosion phenomenon as function of the local metal microstructure is of crucial importance. In this work, we summarize the information presented in our previous publications[1-3] and present an overview of the different local (electrochemical) techniques...
journal article 2017
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Pirgazi, H. (author), Kestens, L.A.I. (author)
Manual serial sectioning which includes consecutive steps of sample preparation and Electron Back Scattering Diffraction (EBSD) measurement was employed to extract the twodimensional (2D) sections of a pure nickel sample and to reconstruct the three-dimensional (3D) microstructure. A general alignment algorithm based on the minimization of...
conference paper 2015
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Ghodrat, S. (author), Pirgazi, H. (author), Kestens, L.A.I. (author)
To the purpose of evaluating the effect of deformation on the microstructure, aluminum structures were analyzed on tensile strained samples extended to 25% elongation. In the substructure of these deformed samples linear slip patterns were observed, generally confined to the bulk of the grain. In order to study the crystallographic aspect of...
conference paper 2015
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Lapeire, L. (author), Sidor, J. (author), Martinez Lombardia, E. (author), Verbeken, K. (author), De Graeve, I. (author), Terryn, H.A. (author), Kestens, L.A.I. (author)
Nowadays, there is a considerable scientific interest in bulk ultrafine grained materials, due to their potential for superior mechanical properties. One of the possible formation methods of nano-grained materials is cryogenic rolling. The influence of rolling at cryogenic temperatures has been investigated. Significant differences in the...
conference paper 2015
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Gomes, E. (author), Kestens, L.A.I. (author)
Two new methods, one for determining the experimentally observed Orientation Relationship (OR) and another for reconstructing prior austenite phase, are proposed. Both methods are based on the angular deviation of the OR at the grain boundaries. The first algorithm identifies the optimum OR using the misorientation distribution of the entire...
conference paper 2015
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