主题演讲人
Prof. Mohamed Abdel-Hady Gepreel
Prof. Mohamed Abdel-Hady Gepreel
Egypt-Japan University of Science and Technology
演讲主题: Recent trends in the design, phase formation and properties of low-cost high entropy alloys
摘要: 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.
演讲人简历: 格普里尔教授于2008年从日本名古屋大学获得博士学位。他目前就职于埃及-日本科技大学（E-JUST），2009年成为先进材料系教授。他是合金设计和微观结构控制的专家，致力于开发用于生物医学应用的新一代钛合金、超高强度钛合金、负零热膨胀合金以及新功能高熵合金。他曾获得2014年埃及工程领域的国家奖，以及其他17项国家和国际奖项。他曾担任多个知名研究机构的访问教授，如日本东北大学、印度马德拉斯理工学院、美国密歇根州立大学、韩国基础科学研究所、俄罗斯联合核研究所等，指导过16位硕士生和15位博士生。他参与组织了15个国际会议，并受邀担任全球20多个国际会议的主题发言人/特邀发言人。他曾主持19项资助研究项目（国家和国际项目），并发表了150多篇论文（其中包括8项专利、5篇书籍章节、67篇期刊论文和73篇国际会议论文）。
Prof. Majid R. Ayatollahi
Prof. Majid R. Ayatollahi
Iran University of Science and Technology
演讲主题: "Epoxy-Carbon nanotube" nanocomposites: Mechanical properties and fracture behavior
摘要: 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.
演讲人简历:Majid R. Ayatollahi（1998年获得英国布里斯托大学博士学位）是伊朗科技大学机械工程学院的杰出教授兼疲劳与断裂研究实验室主任。他的主要研究领域是工程材料的断裂力学，以及实验和计算固体力学。他曾多次获得伊朗科学研究与技术部、伊朗科学院和伊朗机械工程师协会颁发的杰出教授国家奖项。Ayatollahi教授是三本由Springer International分别在2016年、2019年和2020年出版的书籍的作者。目前，他是八个国际（ISI）期刊的编委成员，并为超过65个国际期刊担任评审员。他的研究实验室目前与几家著名的欧洲和东亚机构进行国际研究合作。他在国际会议和大学中多次发表主题演讲和特邀报告。
Majid R. Ayatollahi（1998年获得英国布里斯托大学博士学位）是伊朗科技大学机械工程学院的杰出教授兼疲劳与断裂研究实验室主任。他的主要研究领域是工程材料的断裂力学，以及实验和计算固体力学。他曾多次获得伊朗科学研究与技术部、伊朗科学院和伊朗机械工程师协会颁发的杰出教授国家奖项。Ayatollahi教授是三本由Springer International分别在2016年、2019年和2020年出版的书籍的作者。目前，他是八个国际（ISI）期刊的编委成员，并为超过65个国际期刊担任评审员。他的研究实验室目前与几家著名的欧洲和东亚机构进行国际研究合作。他在国际会议和大学中多次发表主题演讲和特邀报告。
Prof. Ashanendu Mandal
Dr. Ashanendu Mandal
University of Calcutta
演讲主题: 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
摘要: 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.
演讲人简历: 阿尚恩杜·曼达尔（Ashanendu Mandal）在加尔各答大学获得了化学学士学位（B. Sc）和化学工程学士学位（B. Tech）。他在印度理工学院（IIT）卡哈拉古尔获得了化学工程硕士学位（M. Tech）。此外，他还在新德里的印度国立开放大学（IGNOU）获得了金融MBA学位，并参加了加尔各答印度管理学院（IIM Calcutta）的高级管理项目。他还在加尔各答大学获得了化学工程博士学位（Ph. D. (Tech)）。 曼达尔博士在印度国家石油公司（ONGC）工作了超过34年，积累了丰富的经验，包括调试、改造、安全、操作、人工举升、压力维护、提高采收率（EOR）和海上及陆上油田的规划。他在上游和下游石油产品的市场营销方面也有丰富经验。 曼达尔博士在《Chemical Weekly》上发表了多篇技术论文，并在许多国际期刊上发表了研究论文。他曾前往25个以上国家，参加培训项目，并作为特邀演讲者或小组成员参加国际会议。曼达尔博士是印度化学会和印度科学大会的终身会员。
