In Situ Observations and Measurements of Mechanically Induced Grain Boundary Migration in a Scanning Electron Microscope

Abstract:

A novel set-up developed to continuously observe and measure stress driven grain boundary migration is presented. A commercially available tensile/compression SEM unit was utilized for in-situ observations of mechanically loaded samples at elevated temperatures up to 850°C by recording orientation contrast images of bicrystal surfaces. Two sample holders for application of a shear stress to the boundary in bicrystals of different geometry were designed and fabricated. The results of first measurements are presented.

• Periodical: Materials Science Forum (Volumes 715-716)
• Pages: 819-824
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.715-716.819
• Online since: April 2012
• Authors: Tatiana Gorkaya, Thomas Burlet, Dmitri A. Molodov, Günter Gottstein
• Keywords: Bi-Crystal, Grain Boundary Migration, In Situ Observation, Shear Stress

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