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BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20220217T150000
DTEND;TZID=Europe/Brussels:20220217T160000
DTSTAMP:20260623T233053
CREATED:20220126T100842Z
LAST-MODIFIED:20230703T124640Z
UID:1253-1645110000-1645113600@mmelo.eu
SUMMARY:Online Lecture by prof. Thomas Pardoen
DESCRIPTION:Recent progress in micromechanics-based approach of ductile fracture in metals\n\n\n\n\n\n\n\n\n\nSpeaker: prof. Thomas Pardoen – Institute of Mechanics\, Materials and Civil Engineering & Ecole Polytechnique de Louvain\, UCLouvain\, Belgium. \n\n\n\n\n\n\n\nTitle: Recent progress in micromechanics-based approach of ductile fracture in metals. \n\n\n\nAbstract: The mechanisms of nucleation\, growth and coalescence of voids leading to the fracture of ductile metals have been investigated for more than 50 years and modelled with increasing degrees of complexity. Nevertheless\, we are still far today from a fully predictive approach\, in particular in the context of the new generations of metallic alloys with advanced microstructures. Challenges remain on several fronts\, for instance: the description of the statistical aspects of void nucleation\, the transition into shear dominated failure mode\, the physical meaning of the internal lengths entering non local models\, the treatment of competing fracture mechanisms (e.g. inter-granular versus ductile)\, etc. In this talk\, recent progress made regarding the characterization and modelling of ductile fracture in Al alloys and in steel will be presented\, insisting on void nucleation aspects. \n\n\n\n \n\n\n\nThis session was chaired by prof. dr. Maria J. Santofimia Navarro (Delft University of Technology).
URL:https://mmelo.eu/event/online-lecture-by-prof-thomas-pardoen/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2022/01/Thomas-Pardoen-100x13396dpi.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20220120T150000
DTEND;TZID=Europe/Brussels:20220120T160000
DTSTAMP:20260623T233053
CREATED:20220118T161735Z
LAST-MODIFIED:20230703T124437Z
UID:1232-1642690800-1642694400@mmelo.eu
SUMMARY:Online Lecture by prof. Leo A.I. Kestens
DESCRIPTION:Texture Control in Metal Manufacturing : Theory and Practice\n\n\n\n\n\n\n\n\n\nSpeaker: prof. Leo A.I. Kestens – Department of Electromechanical\, Systems and Metal Engineering – Ghent University\, Belgium. \n\n\n\n\n\n\n\nTitle: Texture Control in Metal Manufacturing : Theory and Practice. \n\n\n\nAbstract: 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 rolling\, cold rolling and annealing.Austenite-to-ferrite phase transformation\, plastic deformation\, recrystallization and grain growth are the dominant solid-state transformations occurring during thermo-mechanical processing of steel sheets.Moreover\, the crystallographic texture ensuing of a solid-state transformation is a characteristic feature of the physical mechanics underlying this transformation and therefore\, a precise understanding of the texture formation mechanisms is an important tool in gaining a better understanding of metal physics phenomena.The present lecture will give an overview of the current state-of-the-art in these issues. \n\n\n\n \n\n\n\nThis session was chaired by prof. Joakim Odqvist (KTH).
URL:https://mmelo.eu/event/online-lecture-by-prof-leo-a-i-kestens/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2022/01/Leo-Kestens-100x13396dpi.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20211216T150000
DTEND;TZID=Europe/Brussels:20211216T160000
DTSTAMP:20260623T233053
CREATED:20211126T120036Z
LAST-MODIFIED:20230703T124255Z
UID:908-1639666800-1639670400@mmelo.eu
SUMMARY:Online Lecture by prof. em. Wolfgang Bleck
DESCRIPTION:Some particular findings on microstructures and mechanical properties of advanced high strength steels\n\n\n\n\n\n\n\n\n\nSpeaker: prof. em. Wolfgang Bleck\, Steel Institute of RWTH Aachen University\, Germany. \n\n\n\n\n\n\n\nTitle: Some particular findings on microstructures and mechanical properties of advanced high strength steels. \n\n\n\nAbstract: Optimizing the balance of conflictive mechanical properties like strength\, toughness\, fatigue\, formability is the key issue of current steel and process development. Therefore\, new steel design concepts use high Mn contents for controlling low temperature phase transformations\, for stabilizing the fcc phase\, and for adjusting the stacking fault energy. By this\, extremely fine microstructures down to the nm-level could be achieved. Heterogeneous microstructure combines various phases\, including metastable phases\, enable new combinations of mechanical properties\, especially when phenomena such as the TRIP\, TWIP\, or MBIP effects are triggered. Materials that have one or more of these special features are summarized under the term Advanced High Strength Steels (AHSS).The talk will report on recent results for various steels. This will be done in the order of increasing manganese content as the characteristic alloying element for AHSS. In complex phase steels the challenging description of the heterogeneous microstructure will be discussed and the competition of dual phase and complex phase steel with respect to global and local formability will be elucidated. For air hardening steels\, the control of low temperature phase transformations is required for improved toughness and fatigue behaviour. With higher Mn contents in medium Mn steels metastable phases become interesting; this applies equally to the microstructure setting and to the mechanical properties. The interaction of alloying elements can no longer be neglected; special challenges in process technology now also have to be considered. This will be highlighted\, as an example\, for continuous casting and for continuous annealing.The lecture will look at developments in the recent past and show possible areas of application for the newly developed steels. Conclusions about the importance of new design principles are drawn. \n\n\n\nThis session was chaired by prof. Erik Offerman (TU Delft).
URL:https://mmelo.eu/event/online-lecture-by-prof-em-wolfgang-bleck/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2021/11/Wolfgang-Bleck-100x13396dpi.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20211118T150000
DTEND;TZID=Europe/Brussels:20211118T160000
DTSTAMP:20260623T233053
CREATED:20211118T174619Z
LAST-MODIFIED:20230703T123653Z
UID:353-1637247600-1637251200@mmelo.eu
SUMMARY:Online Lecture by prof. Sir Harry Bhadeshia
DESCRIPTION:Diffusion-controlled growth in multicomponent steels\, with steep concentration gradients\n\n\n\n\n\n\n\n\n\nSpeaker: prof. Sir Harry Bhadeshia\, Cambridge University\, United Kingdom. \n\n\n\n\n\n\n\nTitle: Diffusion-controlled growth in multicomponent steels\, with steep concentration gradients. \n\n\n\nAbstract: Since the work of Coates and others\, it has been considered that diffusion-controlled growth in multicomponent systems occurs in one of two ways\, assuming local equilibrium at the transformation front. Thus\, the growth either involves the long-range partitioning of substitutional solutes\, or a tiny amount of partitioning so that the product phase essentially has the same composition as that of the parent. But in the latter case\, steep gradients in concentration are predicted at the transformation front.Indeed\, these phenomena are encoded in most popular algorithms for estimating growth rates and therefore\, are applied widely.Coates himself recognised the difficulty of steep gradients. I will present some quantitative arguments to demonstrate that local equilibrium with negligible partitioning cannot exist and show that there is no experimental evidence to suggest otherwise. \n\n\n\nThe session was chaired by prof. Maria Santofimia Navarro (TU Delft).
URL:https://mmelo.eu/event/online-lecture-by-prof-sir-harry-bhadeshia/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2021/11/Sir-Harry-Bhadeshia-100x13396dpi.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20211021T133000
DTEND;TZID=Europe/Brussels:20211021T143000
DTSTAMP:20260623T233053
CREATED:20211019T150755Z
LAST-MODIFIED:20220216T111719Z
UID:226-1634823000-1634826600@mmelo.eu
SUMMARY:Online Lecture by snr. prof. Elena Pereloma
DESCRIPTION:Characterisation of Deformed Microstructure in Alloys Exhibiting Transformation-Induced Plasticity and/or Twinning-Induced Plasticity Effects\n\n\n\n\n\n\n\nSpeaker: Snr. prof. Elena Pereloma\, University of Wollongong\, Australia. \n\n\n\n\n\n\n\nTitle: Characterisation of Deformed Microstructure in Alloys Exhibiting Transformation-Induced Plasticity and/or Twinning-Induced Plasticity Effects. \n\n\n\nAbstract: Strength-ductility relationships deviate from the typical ones of reduction in ductility with strength increase in some metals and alloys. Such materials also exhibit high strain hardening rates. These unique mechanical properties are due to the accommodation of plastic deformation by twinning and/or phase transformations in addition to slip. Two main groups of these materials are medium-high Mn steels and metastable β titanium alloys. There is a continuous research effort aimed at microstructure control under different loading conditions in these alloys. This lecture will discuss the challenges of characterisation of deformation behaviour of metastable β titanium alloys from micro- to nano-level with the focus on the current understanding of complex hierarchical microstructures. \n\n\n\nThe session was chaired by prof. Leo Kestens (Ghent University).
URL:https://mmelo.eu/event/online-lecture-by-snr-prof-elena-pereloma/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2021/10/Elena-Pereloma-133x100-1.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20210916T150000
DTEND;TZID=Europe/Brussels:20210916T160000
DTSTAMP:20260623T233053
CREATED:20211018T211854Z
LAST-MODIFIED:20220216T111747Z
UID:159-1631804400-1631808000@mmelo.eu
SUMMARY:Online Lecture by prof. Dierk Raabe
DESCRIPTION:Sustainability of Metals and their role in a Circular Economy\n\n\n\n\n\n\n\n\n\nSpeaker: prof. Dierk Raabe\, Max-Planck-Institut für Eisenforschung\, Düsseldorf\, Germany. \n\n\n\n\n\n\n\nTitle: Sustainability of Metals and their role in a Circular Economy. \n\n\n\nAbstract: This presentation is about challenges and suited measures targeting the improvement of the sustainability of metallic alloys.Metals have enabled technological progress over millennia and have an enduring importance in our society. They paved the path of human civilization with load-bearing and functional applications that can be used under the harshest environmental conditions\, from the Bronze Age onwards. Only metallic materials encompass such diverse features as strength\, hardness\, workability\, damage tolerance\, joinability\, ductility and toughness\, often combined with functional properties such as corrosion resistance\, thermal and electric conductivity and magnetism.Today we produce and consume about 2 billion tons of metals every year\, with steels alone standing for a production of currently 1.85 billion tons per year. The huge and accelerating demand for load-bearing (structural) and functional metallic alloys in key sectors such as green energy supply\, infrastructures\, health\, durable construction\, robotics\, passenger safety and modern transportation is resulting in predicted production growth rates of up to 200% until 2050 [1].Most of these materials\, specifically steel\, aluminium\, nickel and titanium\, require a lot of energy when extracted and manufactured and these processes emit large amounts of greenhouse gases and pollution. This means that the huge success of metallic products and industries also brings them into a position where they have an important role in addressing the rapidly rising environmental crisis.The availability of metals (some of the elements used in alloys are among the most abundant ones)\, efficient mass producibility\, low price and amenability to large-scale industrial production (from extraction to the metal alloy) and manufacturing (downstream operations after solidification) have become a substantial environmental burden: worldwide production of metals leads to a total energy consumption of about 53 exa Joules (8% of the global energy used) and 35% of industrial CO2-equivalent emissions (4.4 gigatons of carbon dioxide equivalent) when counting only steels and aluminium alloys (the largest fraction of metal use by volume).This lecture discusses methods for improving the direct sustainability of structural metals\, in areas including reduced-carbon-dioxide primary production\, recycling\, scrap-compatible alloy design\, contaminant tolerance of alloys and improved alloy longevity. The lecture also discusses the effectiveness and technological readiness of individual measures and also shows how novel structural materials enable improved energy efficiency through their reduced mass\, higher thermal stability and better mechanical properties than currently available alloys [1].[1] Raabe D\, Tasan CC\, Olivetti EA. Strategies for improving the sustainability of structural metals. Nature. 2019 Nov; 575 (7781): 64-74. \n\n\n\nThe session was chaired by prof. Annika Borgenstam (KTH Royal Institute of Technology).
URL:https://mmelo.eu/event/online-lecture-by-prof-dierk-raabe/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2021/10/Dierk-Raabe-133x100-1.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20210617T150000
DTEND;TZID=Europe/Brussels:20210617T160000
DTSTAMP:20260623T233053
CREATED:20211018T181832Z
LAST-MODIFIED:20220216T111849Z
UID:146-1623942000-1623945600@mmelo.eu
SUMMARY:Online Lecture by prof. dr. Dorte Juul Jensen
DESCRIPTION:Metal Microstructures in 3D and 4D\n\n\n\n\n\n\n\n\n\nSpeaker: prof. dr. Dorte Juul Jensen\, from Danish Technical University\, Risoe\, Denmark. \n\n\n\n\n\n\n\nTitle: Metal Microstructures in 3D and 4D. \n\n\n\nAbstract: Characterization of metal microstructures in 3D is not new. But a new ‘wave’ of experimental methodologies emerged during the late 1990ies – early 2000ies\, fueled by novel possibilities at large international synchrotron facilities. Thereby also 4D (x\,y\,z\,time) investigations became possible. A short ‘evolution history’ of these methods is presented\, with focus on today’s possibilities and limitations. Examples of applications for recent studies of recrystallization are given\, highlighting scientific questions which cannot be addresses by more traditional experimental techniques. Possibilities for direct linking the experimental data to simulation tools are also discussed. Finally a view towards future development of similar 3D/4D techniques operating in home laboratories is given and it is demonstrated how grain mapping by these methods may be improved using artificial intelligence (deep learning) methods. \n\n\n\nThe session was chaired by prof. Leo Kestens (Ghent University).
URL:https://mmelo.eu/event/online-lecture-by-prof-dr-dorte-juul-jensen/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2021/10/Dorte-Juul-Jensen-133x100-1.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20210520T150000
DTEND;TZID=Europe/Brussels:20210520T160000
DTSTAMP:20260623T233053
CREATED:20211018T180053Z
LAST-MODIFIED:20220216T111909Z
UID:138-1621522800-1621526400@mmelo.eu
SUMMARY:Online Lecture by dr. Baptiste Gault
DESCRIPTION:Introduction to atom probe tomography: performance and opportunities in characterizing microstructures\n\n\n\n\n\n\n\n\n\nSpeaker: dr. Baptiste Gault\, Max-Planck-Institut für Eisenforschung\, Düsseldorf\, Germany. \n\n\n\n\n\n\n\nTitle: Introduction to atom probe tomography: performance and opportunities in characterizing microstructures. \n\n\n\nAbstract: Atom probe tomography is a burgeoning microscopy and microanalysis technique\, stemming from field-ion microscopy\, and allowing for compositional mapping of solid materials with sub-nanometre resolution and sensitivity in the range of tens of parts-per-million across all elements. In this lecture\, I will go back to the basics of the technique\, introduce the fundamental principles that enable the analysis but also limit the technique’s performance. I will showcase examples of applications to the compositional analyses of a range of microstructural features including grain and phase boundaries\, structural defects and secondary phases\, in relation to the host materials’ macroscopic physical properties. \n\n\n\nThe session was chaired by prof. Joakim Odqvist (KTH Royal Institute of Technology).
URL:https://mmelo.eu/event/online-lecture-by-dr-baptiste-gault/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/jpeg:https://mmelo.eu/wp-content/uploads/2021/10/Baptiste-Gault-133x100-1.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Brussels:20210415T150000
DTEND;TZID=Europe/Brussels:20210415T160000
DTSTAMP:20260623T233053
CREATED:20211018T071645Z
LAST-MODIFIED:20220216T111955Z
UID:58-1618498800-1618502400@mmelo.eu
SUMMARY:Online Lecture by prof. Ernst Kozeschnik
DESCRIPTION:Nucleation in poly-crystalline metallic structures: Classical Theory and recent extensions\n\n\n\n\n\n \n\n\n\n  \n\n\n\nSpeaker: prof. Ernst Kozeschnik\, Technical University Vienna\, Austria. \n\n\n\n\n\n\n\nTitle: Nucleation in poly-crystalline metallic structures: Classical Theory and recent extensions. \n\n\n\nAbstract: Nucleation is the initiating mechanism by which new phases occur in supersaturated solutions. In poly-crystalline materials\, heterogeneous nucleation sites can substantially facilitate the appearance of new phases. This lecture will introduce the main aspects of Classical Nucleation Theory (CNT)\, first\, and discuss\, which mechanisms need to be accounted for in the particular situation of metallic microstructures. The impact of nucleus size\, chemical composition of the nucleus and diffuse interfaces will be reviewed\, as well as some aspects of heterogeneous site energies and how they influence the nucleation barrier. Finally\, the model is used to demonstrate that nucleation at grain boundaries can occur with minimum or even without nucleation barrier\, as observed experimentally in continuous cooling DSC experiments in Al alloys. \n\n\n\nThe session was chaired by prof. Erik Offerman (Delft University of Technology).
URL:https://mmelo.eu/event/lecture-nucleation-in-poly-crystalline-metallic-structures-classical-theory-and-recent-extensions/
CATEGORIES:Online Lectures
ATTACH;FMTTYPE=image/png:https://mmelo.eu/wp-content/uploads/2021/10/Ernst-Kozeschnik-133x100-1.png
END:VEVENT
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