Keynote Speakers

Prof. Mohamed Abdel-Hady Gepreel

Mohamed Abdel-Hady Gepreel
Prof. Mohamed Abdel-Hady Gepreel
Egypt-Japan University of Science and Technology
Speech title: Recent trends in the design, phase formation and properties of low-cost high entropy alloys

Abstract: New category of alloys is the High-entropy alloys (HEAs) that contain five or more principal elements in equal or near-equal percentages with high configuration entropy (ΔSconf > 1.5 R, where R is the gas constant). Different methodologies to design new HEAs are applied. The phase equilibrium prediction by commercial software like ThermoCalc is a useful tool for researchers. Also, the empirical relations between metastable phases formation, alloy properties and the thermodynamic parameters are widely used. Recently, machine learning and artificial intelligence techniques are being developed by many researchers to support medium and high entropy alloys’ design. One of the new HEAs which possesses a good combination of low-cost alloying elements, has single FCC solid solution structure, good cold workability and mechanical properties is Al5Cr12Fe35Mn28Ni20 alloy. The design considerations to strengthen Al5Cr12Fe35Mn28Ni20 HEA with alternating the Al, Mn, Fe and Ni content as well as thermomechanical processes will be emphasized. The role of alloying the low-cost HEAs with Si, which is a BCC stabilizer and silicide former, to improve the corrosion and oxidation resistance will be discussed. The modification of the low-cost HEAS with Ti addition to achieve higher mechanical properties at room and high temperatures will be explored as well. Finally, using artificial neural network approach in designing new medium entropy alloys with low Young’s modulus and high strength and corrosion resistance will be presented.

Short Biography:Prof. M. Gepreel got his PhD from Nagoya University, Japan in 2008. He worked in Nagoya University then Tohoku University, Japan, till 2010 when he moved to E-JUST. He works as Professor of advanced materials at E-JUST since 2019. He is specialist in alloy design and microstructure control. He worked in developing New generation of Ti-alloys for biomedical applications, Ultra-high strength Ti-alloys, Negative and zero thermal expansion alloys and recently developing new functional High entropy alloys. He received the State's Award (Egypt) in Engineering, 2014, beside 17 more national and international awards. He was visiting professors to many well-known institutes, such as; Tohoku University, Japan, IIT-Madras, India, Michigan State University, USA, Korean Basic Science Institute, Korea, Joint Institute for Nuclear Research, Russia. He supervised 16 M.Sc. and 15 PhD thesis. He shared in organizing 15 International conferences. He was invited as Keynote speaker /invited speaker for more than 20 international conferences worldwide. He had 19 funded research projects (national and international) and more than 150 publications [including filed 8 Patents, 5 Book chapters, 67 Journal papers, and 73 international conferences].


Prof. Majid R. Ayatollahi

Majid R. Ayatollahi
Prof. Majid R. Ayatollahi
Iran University of Science and Technology
Speech title: "Epoxy-Carbon nanotube" nanocomposites: Mechanical properties and fracture behavior

Abstract: Epoxy resins are one of the most common thermosets which are widely used in structural and specialty composites applications. They also make great adhesive bonding, and are one of the few adhesive materials that can be used in metal-to-metal adhesive joints. However, epoxy resins are often susceptible to brittle fracture especially in the presence of preexisting cracks. In order to improve their strength and toughness, researchers have proposed reinforcing epoxy resins by adding multi-walled carbon nanotubes (MWCNTs) which are known for their excellent stiffness and strength as well as their extraordinary electrical and thermal properties. Meanwhile, it is important to investigate the mechanical properties and the fracture behavior of the nanocomposites made of epoxy resins and MWCNT. Previous experimental studies dealing with fracture in epoxy-based nanocomposites are predominantly limited to pure tensile loading cases. Whereas epoxy components in practical applications very often experience complicated loading conditions e.g. a mixture of tension and shear loads. The aim of this research is to present some new experimental results recently obtained from fracture tests performed on epoxy-MWCNT nanocomposites under a combination of tension and out-of-plane shear loading. First, a new test configuration designed for applying the load to the test samples is introduced. The test set up is then simulated by finite element method and the crack tip parameters are extracted for different mixtures of tension and shear loading. In order to evaluate the applicability of the suggested fixture, first a number of experiments are performed on PMMA. Afterwards, the main experiments are performed on nanocomposite specimens with different percent contents of MWCNT. Scanning electron microscopy technique is then employed to inspect the fracture surfaces. The experimental results are presented and discussed according to different micro-mechanisms involved in the fracture behavior of nanocomposites. The obtained results suggest that crack bridging and crack deviation, due to the presence of carbon nanotubes, are two major effective mechanisms which can enhance the fracture resistance of tested nano-composites.

Short Biography:Majid R. Ayatollahi (PhD, University of Bristol, UK, 1998) is a distinguished professor and director of fatigue and fracture research laboratory in the School of Mechanical Engineering at Iran University of Science and Technology (IUST). His main fields of interest are fracture mechanics of engineering materials, as well as the experimental and computational solid mechanics. He has received several prestigious national awards as eminent professor from the Iranian Ministry of Science, Research and Technology, Iranian Academy of Science, and Iranian Society of Mechanical Engineers. Professor Ayatollahi is the author of three books published by Springer International in 2016, 2019 and 2020. He is currently a member of the editorial boards for eight international (ISI) journals and has served as reviewer for more than 65 international journals. His research lab is now in international research collaboration with several renowned European and East Asian institutions. He has presented numerous plenary/keynote talks in international conferences and universities.
With an h-index=78 (google scholar), Professor Ayatollahi has published more than 370 fully refereed papers in well-known international (ISI) journals. His articles span a wide range of theoretical, computational and experimental studies dealing with the mechanical and failure behavior of different engineering materials at various length scales.


Prof. Ashanendu Mandal

Ashanendu Mandal
Dr. Ashanendu Mandal
University of Calcutta
Speech title: Potential application of innovative solid waste materials for adsorptive removal of toxic phenol from wastewater for ensuring cleaner environment and also for generating circular economy

Abstract:This research aims for adsorptive removal of phenol from wastewaters by solid waste materials viz. guava tree bark, rice husk, neem leaves, activated carbon from coconut coir, rice husk ash, red mud, clarified sludge from basic oxygen furnace and activated alumina. The characterizations of the adsorbents are performed by SEM, XRD, FTIR and BET analyzers. The experiments of phenol removal are carried out in batch process with the variation of initial phenol concentration (5-500 mg/L), initial pH (2-12), adsorbent dose (0.10-20 gm/L), temperature (25-50°C) and contact time (30-600 min). The maximum phenol removal percentage was found with neem leaves used as adsorbent and it was 97.50%. The kinetics study shows that the pseudo-second order model is best fitted for all adsorbents except red mud. The kinetic modeling shows that the adsorption mechanism is supportive of film diffusion, intra-particle diffusion and chemisorption for all adsorbents. The isotherm analysis suggests that Freundlich isotherm model is best supportive for guava tree bark, rice husk, neem leaves, activated carbon, red mud and activated alumina, whereas Langmuir and D-R isotherm are best supportive for rice husk ash and clarified sludge respectively. The thermodynamics shows the spontaneity, randomness and endothermic/exothermic nature of the adsorption processes. The ANN modelings using Levenberg-Marquardt and Scaled Conjugate Gradient algorithms establish that the experimental and predictive data are within allowable range. The studies of scale-up designs, the regeneration of adsorbents and the safe disposal of used adsorbents show that these adsorbents can be used for commercial applications. Further, the column study of phenol removal is also carried out using the most efficient batch adsorbent neem leaves. The study concludes that the wastewater treatment for ensuring cleaner environment is commercially possible using solid waste materials as adsorbents, which in turn can also generate circular economy.

Short Biography: Ashanendu Mandal has graduated as B. Sc in Chemistry and B. Tech in Chemical Engineering from University of Calcutta. He has got his M. Tech Degree in Chemical Engineering from IIT, Kharagpur. He has acquired MBA degree in Finance from IGNOU, New Delhi and has undertaken an Advanced Management Program from IIM Calcutta. He has also acquired the Degree of Ph. D. (Tech) in Chemical Engineering from University of Calcutta. Dr. Mandal has worked in ONGC for more than 34 years and his experience includes commissioning, modifications, safety, operations, artificial lifts, pressure maintenance, EOR and planning in offshore and onshore oilfields. He has also vast experience in marketing of upstream and downstream petroleum products. Dr. Mandal has published technical papers in Chemical Weekly and research papers in many international journals. He has visited more than 25 countries for attending training programs and for participating in international conferences as invited speaker or panelist. Dr. Mandal is a lifetime member of Indian Chemical Society and Indian Science Congress.


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