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Prof. Shigeru Horii

Faculty of Engineering, Kyoto University of Advanced Science, Japan

Speech Title: Linear-drive type modulated rotating magnetic field for triaxial grain orientation

Abstract: Epitaxial growth technique is the typical and practical for production of single crystals which have triaxial aligned and densified microstructure. Recently, a modulated rotating magnetic field (MRF) has been reported as the magnetic field in which the triaxial aligned microstructure can be formed for grains with triaxial magnetic anisotropy. In principle, this MRF technique is a room-temperature process and is useful for fabrication of not only triaxially aligned polycrystals but also composites containing triaxially aligned fillers. However, the most serious issue on the MRF technique is that a sample-rotation system is required to generate MRF when the 10-tesla-class superconducting electromagnets are used. That is, it is a batch process and quite inefficient from the viewpoint of the production process. Recently, our group has newly developed Linear Drive-type MRF (LDT-MRF) apparatus [1] as MRF applicable to the continuous production process for sheet-shaped products in 2018. In this presentation, the principle of the apparatus and recent progress in triaxial magnetic alignment by LDT-MRF are explained.
[1] S. Horii et al., J. Cer. Soc. Jpn. 126 (2018) 885.

Biography:Shigeru Horii is currently a Professor in the Faculty of Engineering at the Kyoto University of Advanced Science (KUAS), Kyoto, Japan. He obtained Dr. Eng. from the Nagoya University, Nagoya, Japan, in 1999. He worked at the University of Tokyo, Tokyo, as a post-doctoral fellow of JSPS from 1999 until 2000. He joined the University of Tokyo as an Assistant Professor from 2000 until 2009 in the Department of Applied Chemistry, and the Kochi University of Technology, Kochi, as an Associate Professor from 2009 until 2013. He worked at the Kyoto University, Kyoto, as an Associate Professor from 2013 until 2019. He joined KUAS in 2019 and is focusing on triaxial magnetic alignment in layered functional materials as a research topic.

Prof. Armando Ramalho

Polytechnic Institute of Castelo Branco, Portugal

Speech Title: Structural integrity evaluation of anisotropic components manufactured by 3D printing

Abstract: The fused filament fabrication process used on low-cost 3D printers has allowed the growth of this manufacturing method in the most diverse technological fields. The use of more strength, rigid, and tough thermoplastics such as polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), polyethene terephthalate glycol (PETG), or polyamides, including their reinforcement with short fibres, allowed the expansion of this technique in areas with demanding structural requirements, in which should be assured a reliable design. Predicting the mechanical integrity of components manufactured by additive processes is a challenging task that is difficulted by the complexity of the geometries fabricated by these processes, along with the anisotropy enhanced by the layer-by-layer manufacturing method and the difficulty in quickly obtaining the elastic and strength properties of the materials, which are strongly influenced by the manufacturing parameters. The use of 3D CAD models in the design phase of components manufactured by 3D printing facilitates the use of the finite element method in assessing their integrity and simulating their in-service behavior. However, in the literature there are few examples of application of the finite element method in the analysis of 3D anisotropic printed parts, and the existing ones are restricted to simple geometries. To deal with the anisotropy of materials and the presence of several phases, intense research has been carried out for the last decades in the field of evaluating the mechanical strength of composite materials, introducing several specific failure criteria. In this speech, the simulation of in-service behavior of components manufactured by 3D printing is presented, applying criteria usually used in the study of composite materials, to evaluate their structural integrity.

Biography: Armando Ramalho holds a PhD degree in Mechanical Engineering completed at the University of Coimbra, Portugal, as well as a MSc in Mechanical Engineering from the Higher Technical Institute of the University of Lisbon. He currently works at the Polytechnic Institute of Castelo Branco, Portugal. He was a Professor at the Polytechnic Institute of Guarda and at the University of Coimbra. He was the Director of the School of Technology of the Polytechnic Institute of Castelo Branco for over twelve years. His current research efforts focus on fatigue of welded structures, design of parts obtained by additive manufacturing, Mechanical Properties of Materials, as well as in simulation of mechanical and biomechanical systems using numerical models developed on finite element software. Some of his most significant publications can be found in https://www.cienciavitae.pt//en/1D19-1C61-FA56

Prof. Osman Adiguzel

Department of Physics, Firat University, Turkey

Speech Title: Thermomechanical Transformations Governing Thermoelasticity and Superelasticity in Shape Memory Alloys

Abstract: A series of alloy systems, called shape memory alloys exhibit a peculiar property, called shape memory effect, by giving stimulus response to changes in the external conditions. This phenomenon is initiated with thermomechanical processes on cooling and deformation and performed thermally on heating and cooling, with which shape of the materials cycle between original and deformed shapes in reversible way. Therefore, this behavior can be called Thermoelasticity. Deformation in low temperature condition is plastic deformation, with which strain energy is stored in the materials and releases on heating by recovering the original shape. This phenomenon is governed by the thermomechanical transformations, thermal and stress induced martensitic transformations. Thermal induced martensitic transformations occur on cooling with cooperative movement of atoms in <110 > -type directions on {110} - type plane of austenite matrix, along with lattice twinning and ordered parent phase structures turn into the twinned martensite structures. The twinned structures turn into detwinned martensite structures by means of stress induced martensitic transformations with deformation. These alloys exhibit another characteristic, called superelasticity with the recoverability of two shapes at different conditions. Superelasticity is performed in only mechanical manner with stressing and releasing the material in elasticity limit at a constant temperature in the parent austenite phase region, and shape recovery occurs instantly and simultaneously upon releasing, by exhibiting elastic material behavior. Superelasticity is performed in non-linear way, unlike normal elastic materials behavior, stressing and releasing paths are different, and cycling loop refers to the energy dissipation. Superelasticity is also result of stress induced martensitic transformation, with which the ordered parent phase structures turn into the detwinned martensite structures by stressing.
These alloys are functional materials with these properties and used as shape memory elements in many interdisciplinary fields, from biomedical application to the building industry. Copper based alloys exhibit this property in metastable β-phase region, which has bcc-based structures. Lattice invariant shears and twinning are not uniform in these alloys, and the ordered parent phase structures undergo the non-conventional layered structures with martensitic transformation. These layered structures can be described by different unit cells as 3R, 9R or 18R depending on the stacking sequences.
In the present contribution, x-ray diffraction and transmission electron microscopy studies were carried out on copper based CuZnAl and CuAlMn alloys. X-ray diffraction profiles and electron diffraction patterns exhibit super lattice reflections inherited from parent phase due to the displacive character of the transformation. Critical transformation temperatures of these alloys are over the room temperature, and alloy samples were aged at room temperature in martensitic condition, and a series of x-ray diffractograms were taken during ageing. X-ray diffractograms taken in a long-time interval show that diffraction angles and intensities of diffraction peaks change with the aging time at room temperature. This result refers to a new transformation in diffusive manner.

Biography:Dr. Osman Adiguzel graduated from Department of Physics, Ankara University, Turkey in 1974 and received PhD- degree from Dicle University, Diyarbakir-Turkey. He studied at Surrey University, Guildford, UK, as a post doctoral research scientist in 1986-1987, and his studies focused on shape memory alloys. He worked as research assistant, 1975-80, at Dicle University and shifted to Firat University in 1980. He became professor in 1996, and he has been retired due to the age limit of 67, following academic life of 45 years. He published over 80 papers in international and national journals; He joined over 120 conferences and symposia in international and national level as Plenary Speaker, Keynote Speaker, Invited speaker, speaker or Poster presenter. He served the program chair or conference chair/co-chair in some of these activities. In particular, he joined in last six years (2014 - 2019) over 60 conferences as Speaker, Keynote Speaker and Conference Co-Chair organized by different companies in different countries.
Additionally, he retired at the end of November 2019, and contributed with Keynote/Plenary Speeches over 120 Virtual/Webinar Conferences, due to the coronavirus outbreak in three year of his retirement, 2020 and 2022. Dr. Adiguzel served his directorate of Graduate School of Natural and Applied Sciences, Firat University in 1999-2004. He supervised 5 PhD- theses and 3 M. Sc theses. He is also technical committee member of many conferences. He received a certificate which is being awarded to him and his experimental group in recognition of significant contribution of 2 patterns to the Powder Diffraction File – Release 2000. The ICDD (International Centre for Diffraction Data) also appreciates cooperation of his group and interest in Powder Diffraction File.
Scientific fields of Dr. Adiguzel: Shape memory effect and displacive phase transformations in shape memory alloys and other alloys, molecular dynamics simulations, alloy modeling, electron microscopy, electron diffraction, x-ray diffraction and crystallography.

Prof. Ivana Salopek Čubrić

University of Zagreb Faculty of Textile Technology, Croatia

Speech Title: Investigation of the Abrasion Resistance of Polymer Yarns

Abstract: Material abrasion is a critical consideration in product design, manufacturing, and maintenance because it has a high impact on several properties. When it comes to the abrasion of polymer yarns, insight into the behaviour of yarns due to constant abrasion is important for ensuring final product quality, performance, and customer satisfaction. For this study, a group of polymer yarns is selected. The yarns differ in raw material, as well as the yarn type. Within the experiment selected yarns in both single condition and within the fabric structure were conducted to different abrasion tests. The study findings reveal that yarn type, raw material composition, and additional treatments significantly influence abrasion resistance. Recycled polyester yarns demonstrate comparable, if not superior, abrasion resistance to conventional ones, making them viable for various applications.

Biography: Ivana Salopek Čubrić completed two studies at the University of Zagreb and received PhD in technical sciences at the same university. Since the year 2002, she has been employed at the University of Zagreb Faculty of Textile Technology recently in the status of a full professor. She led and was a collaborator on several EU-funded projects and is a lead of a project funded by the Croatian Science Foundation. She is a reporter and reviewer of international competitive projects for different EU agencies. She has published over 250 papers in journals, books and conference proceedings and was the editor of 6 proceedings of international scientific conferences. She is a frequent guest lecturer at a number of European institutions with long research stays at Loughborough University (UK) and the University of Maribor (Slovenia). She served as president and vice president of the Croatian Ergonomics Society, is a member of the editorial board of 8 scientific journals, and participated as an active member of the organizational and program committees of 18 conferences. As part of her teaching activities, she participated in the teaching of 15 courses at all levels of studies. She mentored 50 final and graduate theses. She received several awards for scientific and teaching work. At her home institution, she was the head of the Study for obtaining the requirements for admission to graduate studies, the head of the Extraordinary Graduate Studies, the president of the Committee for Public Relations and the head of the Department for Textile Design and Management (for two terms). Additionally, she is active as the president of TO 159 at the State Institute for Standards in the field of ergonomics.

Assoc. Prof. Sajid Hussain Siyal

Dawood University of Engineering and Technology, Pakistan

Speech Title: Design and Development of Solid State electrolyte by using the Novel strategy of UV for Energy Storage devices (Lithium Ion Batteries)

Abstract: Lithium Ion batteries (LIBs) are promising energy storage devices due to the high capacity and lower negative electrochemical potential. Nevertheless, their concrete applications remain disturbed by unbalanced electrolyte-electrode interfaces, limited electrochemical window, and high-risk. Herein, a novel strategy to obtain ceramic-based electrolytes that possess great potential in energy storage due to their higher level of energy densities in LMBs. UV Irradiation allows to obtain of a highly cross-linked solid-state electrolyte membrane that was designed for the use of energy storage devices. The membrane was successfully fabricated by polymer and nanofillers of ceramics with the help of UV photo-polymerization. The cross-linked solid-state membrane can accommodate a liquid inside the membrane via strong interaction with lithium-ion and solvents. Solid-state membrane that shows much higher mechanical properties than pure PEO based electrolyte. The fundamental function of ceramic nanoparticles is to support in building a stable electrolyte interphase (SEI) and suppress the growth of dendrites. The prepared ceramic-based electrolyte effectively renders to inhibit lithium dendrite growth in asymmetrical cell Li/SSE/Li test during charge/discharge at a current density of 2 mAcm-2. In addition, the battery assembled of LiFePO4/SSE/Li exhibits superior charge/discharge cycling. This provides a fundamental strategy that to improve the applications of energy storage devices performance.

Biography: Dr. Sajid Hussain Siyal is currently working Associate Professor (BPS 20) /Chairman Department of Metallurgy and Material Engineering, Dawood University of Engineering and Technology Karachi.
Dr. Sajid Hussain Siyal joined the Academia at Dawood University of Engineering and Technology, Karachi, as lecturer (May 2009), soon after his graduation in Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro in 2008. He completed his Masters in Materials Engineering from NED University of Engineering and Technology Karachi in 2014 and Ph.D. in Materials Science and Engineering from Advanced Composite Center, State Key Laboratory of Organic-Inorganic composites, Beijing University of Chemical Technology in December 2019. He returned to join Dawood University as Assistant Professor and after one year he became Associate Professor and Chair of the Department in Nov 2020. Dr. Sajid Siyal published more than 50 research Articles. His Area of expertise in Solid state electrolytes for energy storage devices/Lithium ion batteries and composite materials.

Assoc. Prof. Muzamir Hasan

Universiti Malaysia Pahang Al-Sultan Abdullah, Malaysia

Speech Title: Influence of Cockle Shell Ash and Lime on Geotechnical Properties of Expansive Clay Soil Stabilized at Optimum Silica Fume Content

Abstract: The study investigates the strength improvement of kaolinite clay soil with the inclusion of various percentages and combinations of silica fume (SF) and cockle shell ash (CKSA). Hence, the mechanical properties of various mix ratios of SF and CKSA are examined through the standard Proctor, unconfined compressive strength (UCS), and consolidated isotropic undrained (CIU) triaxial tests. The samples were treated for 1, 7, 14 and 30 days and examined under the UCS tests. The experimental results show that the strength of the kaolinite clay significantly rises with the inclusion of SF and CKSA at dissimilar mix ratios and curing days. The Field Emission Scanning Electron Microscopy (FESEM) profile has illustrated that the kaolinite clay soil molecules were fused jointly with SF and CKSA to form calcium aluminate hydrates (CAH) and calcium silicate hydrate (CSH), which enhanced the development of strength of the stabilized kaolinite clay. The combination of SF and CKSA resulted in a significant strength increment of the kaolinite clay soil up to 86.99%.

Assoc. Prof. Bappa Acherjee

Birla Institute of Technology, India

Speech Title: Transformative Laser Fusion Strategies for Polymers and Hybrid Composites: Innovations and Future Directions

Abstract: Laser welding, employing intense laser light for material heating and melting, offers a contactless, precise, and adaptable alternative to traditional methods like friction, vibration, and electrical resistance in polymer welding. Laser transmission welding (LTW) has emerged as a promising technique for joining polymers in critical applications such as medical equipment, electronics, automobiles, and packaging, where hermetic sealing and minimal thermomechanical stresses are paramount. In LTW, a laser beam targets polymer parts arranged in overlapping positions, where the upper part is transparent to the laser beam while the lower part absorbs it. This selective heating at the mating surface allows precise fusion. The heat generated in the absorbing polymer transfers to the transparent part. Proper clamping maintains contact, facilitating conduction heating and preventing expansion. The process triggers cross-linking, forming a weld influenced by laser wavelength, polymer structure, and pigment characteristics.
Over the years, several novel LTW techniques have been developed, each with its unique approach to laser scanning, process flexibility, and cycle time. Notable advancements include clear welding, absorber-free welding, wobble welding, and hybrid welding techniques. Beyond polymer bonding, LTW extends its utility to welding hybrid structures composed of polymers, composites, metals, ceramics, and wood. Variations such as laser-assisted metal-to-polymer welding and laser-induced fusion technology play significant roles in facilitating the fusion of such hybrid structures.
This technical overview will provide insights into recent developments in LTW for both polymer and hybrid structure welding. Additionally, future research directions and emerging trends in LTW technology will be highlighted.

Biography: Dr. Bappa Acherjee is an Assistant Professor (Grade I) in the Department of Production and Industrial Engineering, BIT Mesra, Ranchi. He received his Ph.D. in Production Engineering from Jadavpur University in 2012, in the field of laser beam welding. His research interests include laser material processing, welding, and the application of the finite element method in manufacturing processes. Dr Acherjee has authored over 100 peer-reviewed publications spanning journal papers, conference papers, and book chapters; 2 papers received the most downloaded paper awards from Elsevier. Currently, he supervises three sponsored research projects from the Science and Engineering Research Board (SERB), Govt. of India, totaling 13.8 million Indian Rupees. Under his guidance, one scholar has been awarded a Ph.D., while five others are pursuing their doctoral research. Dr Acherjee's scholarly contributions have garnered recognition, with his name featured in Stanford University's list of the top 2% of Scientists (single year) for three consecutive years spanning from 2020 to 2022. Beyond his research endeavors, he has delivered several invited talks and tutorials. Additionally, he actively contributes to the scholarly community by reviewing papers for journals and conferences, coordinating workshops, and fulfilling editorial duties for academic publications and conferences.

Dr. Tingting Yin

Nanyang Technological University, Singapore

Speech Title: High-Pressure Engineering Hybrid Organic-Inorganic Perovskites towards Advanced Optoelectronic Applications

Abstract: Hybrid organic-inorganic perovskites (HOIPs) are low-cost and highly efficient optoelectronic and photovoltaic materials for applications in solar cells, light emitting diodes, and so on, which is correlated to their intrinsic crystal structures. Now HOIP families include three-dimensional (3D) (CH3NH3PbBr3), two-dimensional (2D) ((C4H9NH3)2(CH3NH3)n-1PbnI3n+1) and nanostructured ((CH3NH3PbBr3 nanoparticles) materials. Herein, well understanding the relationship between the crystal structures and the related functional properties of HOIPs is essential to the application point of view. High pressure up to gigapascal, offers a comprehensive way to study the structure-property correlation of solid materials at the atomic level, where both crystal structures and electronic properties are changed dramatically.
In this presentation, high pressure induced dramatically inorganic and organic part changes in 2D HOIPs are comprehensively studied. On the other hand, structural phase transitions and morphology changes are also explored in 3D HOIPs and their nanoparticles. All the high pressure induced inorganic structural transition is resolved by high pressure in situ X-ray diffraction measurements, morphology change is resolved by transmission electron microscopy, and the correlated optical responses are investigated by absorption and photoluminescence spectroscopy. The rotational isomerism is evidenced by Raman spectroscopy combined with the Ab initio calculations.

Biography: Dr. Tingting Yin is currently a Presidential Postdoctoral Fellow in the Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University (NTU). She has obtained her doctoral degree at NTU in 2018. Her research mainly focuses on optical spectroscopy of low-dimensional semiconductors under different external physical stimuli (high pressure, low temperature, and strong magnetic field), particularly focusing on spectral demonstration, mechanism exploration, and the multi-field manipulation of exciton properties. She has an interdisciplinary research background encompassing optical spectroscopy, high pressure physics, and materials science. Dr. Yin has published 23 high-impact research papers in world-class journals, such as Nat. Commun., J. Am. Chem. Soc., Adv. Mater., Nano Lett., and 2 invited book chapters by IntechOpen. Dr. Yin has participated in 24 international conferences, including 6 invited talks, and served as a Session Chair of one conference. She has received several awards, including selected Young Scientist of Global Young Scientist Summit (2024), Women in Science conference grant (2019), and selected Young Scientist of the 69th Lindau Nobel Laureat Meeting (2019), etc.