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Materials Science at Oregon State University

Metals under Complex Conditions: In-situ and real-time Information Revealed by Neutron and Synchrotron X-Ray Diffraction

Date: Thursday, Mar 8th
Presenter: Prof. Klaus-Dieter Liss, Materials and Engineering Science Program Guangdong Technion - Israel Institute of Technology Materials and Quantum Beams – China Center of Excellence

Abstract


In-situ neutron and synchrotron X-ray diffraction deliver unique and complementary insight into the microstructural evolution of metals at high temperature. Neutrons illuminate a larger bulk volume and reveal quantitative phase abundance, bulk texture, lattice parameter changes and other ensemble averaged quantities. In contrast, fine-bundled high-energy X-rays deliver reflections from a number of individual grains. For each constituting phase, their statistics and behavior in time reveal information about grain growth or refinement, subgrain formation, static and dynamic recovery and recrystallization, slip systems, twinning, etc. Features will be discussed on selected metallic systems, especially to characterize phase evolution and crystallographic changes upon heating or plastic deformation. Emphasis is given on materials undergone severe plastic deformation.