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)。