Modern diffraction methods for the investigation of thermo mechanical processes in materials physics
Loading...
Date
2010-01-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
Well collimated, high energy X-rays of 90 keV from synchrotron sources have been used to study metals undergoing plastic deformation in-situ, in real time and in the bulk of the materials. The spottiness of poorly illuminated Debye-Scherrer rings showing reflections from individual crystallites is analyzed to obtain grain statistics, mosaic spread and orientation. Upon cold deformation, coarse grained materials show fingerprints of sub-grain formation, grain rotation, grain refinement and the evolution from a single grain into the asymptotic texture. Heating of metals under continuous load drives the observation through the regimes of phase transformation and grain relationships therein, grain coarsening, dynamic recovery and dynamic recrystallization. The distinct kinetics and deformation mechanisms of co-existing phases can be distinguished in a dual-phase system. The paper points out these different phenomena which were observed without
precedence.
Description
Keywords
Diffraction, Investigations, Thermomechanical treatments, Materials, Physics, Synchrotrons, Debye-Scherrer method, Granular materials
Citation
Liss, K.-D. (2010). Modern diffraction methods for the investigation of thermo mechanical processes in materials physics. Paper presented to the 34th Annual Condensed Matter and Materials Meeting 2010, Waiheke Island Resort, Waiheke, Auckland, New Zealand 2 - 5 February 2010. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2010/