MSE Colloquium: Hamish Fraser, The Influence of real nanotechnology on the development of novel microstructures in titanium alloys

Ohio Regents Eminent Scholar and Professor, Materials Science and Engineering, The Ohio State University

Abstract:

As is well known, the properties of structural alloys are controlled by nano- and meso-scale microstructural features and defects. For example, aluminum alloys are often strengthened by dispersions of nano-scaled zones and precipitates. In contrast, traditional (near alpha and alpha/beta) titanium alloys are characterized by relatively coarse microstructures. This has changed with the introduction of metastable beta alloys, where refined distributions of second phases have been realized. This talk will describe our efforts both to understand the factors that influence the degree to which the microstructures can be refined, and to then deliberately control the microstructure for optimization of mechanical properties. This has involved much fun investigating structural and compositional instabilities in the beta phase of these metastable alloys.

Bio:

Hamish Fraser is Ohio Regents Eminent Scholar and Professor of Materials Science and Engineering and Director of the Center for the Accelerated Maturation of Materials (CAMM) at OSU. He graduated from the University of Birmingham (UK) with the degrees of B.Sc. (1970) and Ph.D. (1972). He was appointed to the faculty of the University of Illinois in 1973 (Assistant, Associate and Full Professor), before moving in 1989 to the Ohio State University (OSU) as Ohio Regents Eminent Scholar and Professor. He was appointed as a Senior Research Scientist at the United Technologies Research Center from 1979-1980. He has also been a Senior von Humboldt Researcher at the University of Göttingen, a Senior Visitor at the University of Cambridge, a visiting professor at the University of Liverpool, and spent a sabbatical leave at the Max-Planck Institut für Werkstoffwissenscahften in Stuttgart. He has been an Honorary Professor of Materials and Technology at the University of Birmingham since 1988. In 2014, he was recognized as an Honorary Professor at the Nelson Mandela Metropolitan University in Port Elizabeth, South Africa, and appointed as an Adjunct Professor at Monash University, Australia.

He has been a member of the National Materials Advisory Board and the US Air Force Scientific Advisory Board. He has consulted for a number of national laboratories and several industrial companies. He is a Fellow of TMS, ASM, IOM3 (UK), and MSA. He has published over 380 papers in scholarly journals, and given over 280 invited presentations. He has graduated 48 doctoral students and 36 students graduating with the degree of M.S. His work is based on research involving the development of advanced methods of materials characterization (involving high resolution and analytical electron microscopy), materials processing, and microstructure/property relationships. Dr. Fraser has an active research program in the development of new and improved materials, including: advanced materials characterization, direct 3-D microstructural representation, modeling microstructure/properties in light alloys, with an emphasis at present on Ti alloys, development of creep resistant beta-Ti alloys, development of low modulus beta-Ti alloys for orthopedic implants, and powder metallurgy, including additive manufacturing (LENS™, hot isostatic pressing (HIP), and Kinetic Metallization). More recently, he has concentrated effort on establishing and developing the CAMM.