A Brief Introduction to Physical Metallurgy of High-Entropy Alloys
Research Seminar Series
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Date
08 May 2023
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Organiser
Department of Industrial and Systems Engineering, PolyU; Research Institute for Advanced Manufacturing (RIAM)
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Time
16:30 - 18:00
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Venue
Online via Zoom
Speaker
Prof. Sheng Guo
Remarks
Meeting link will be sent to successful registrants
Summary
Since about 20 years ago, there has been a new trend in designing alloys in the physical metallurgy community, which differs significantly from previous practices. In the new category of alloys, high-entropy alloys (HEAs), there is no longer a clear distinction between the dominant alloying element and other elements, and basically, all alloying elements are mixed equiatomically or close to equiatomically. This novel alloy design strategy opens up a vast unexplored compositional space, and potentially new opportunities for numerous new materials and applications, but also brings new challenges on how to properly design these alloys. In this lecture, I will give an overview of HEAs from the physical metallurgy perspective, starting from the definition, moving to the alloy design strategies that are currently adopted by HEAs, and then some typical properties of this relatively new class of metallic materials. Some of my previous and current research areas in this field will also be briefly mentioned.
Keynote Speaker
Prof. Sheng Guo
Professor, Department of Industrial and Materials Science
Chalmers University of Technology,
41296 Göteborg, Sweden
Sheng Guo got his PhD degree in Materials from the University of Oxford, United Kingdom in 2009, with the topic on residual stresses of alumina-based ceramics. The KC Wong Education Foundation based in Hong Kong partially sponsored his PhD study in the UK. Before that, he got his Master of Engineering degree in Materials Science and Engineering in 2005, and a Bachelor of Engineering in Powder Metallurgy in 2002, both from Central South University, Changsha, China. Sheng Guo is currently a Professor at the Department of Industrial and Materials Science, Chalmers University of Technology in Sweden. Sheng joined Chalmers as an Assistant Professor in 2013, and was promoted to Associate Professor in 2016, and to Professor in 2020. Before joining Chalmers, Sheng spent four years working as a postdoctoral researcher at two universities in Hong Kong, City University of Hong Kong, and the Hong Kong Polytechnic University, respectively, under the supervision of Prof. CT Liu. Sheng’s research activities nowadays are focused on alloy design and mechanical properties of high-entropy alloys (HEAs), with a research focus on refractory HEAs and eutectic HEAs, but he is also actively expanding his research areas to functional properties of HEAs.
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