Low angle tilt boundary migration coupled to shear deformation

• Published in: Acta materialia Vol. 55; no. 5; pp. 1843 - 1848
• Main Authors: Molodov, D.A., Ivanov, V.A., Gottstein, G.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-03-2007; Elsevier Science
• Subjects: Applied sciences; Boundaries; Boundary motion; Coupling; Dislocations; Exact sciences and technology; Grain boundaries; Metals. Metallurgy; Migration; Misorientation; Shear strain; Shear stress; Tilt; Tilt boundaries; Translations; Boundary motion; Coupling; Shear strain; Dislocations; Shear; Deformation; Tilt boundary; Dislocation
• ISSN: 1359-6454; 1873-2453
• DOI: 10.1016/j.actamat.2006.10.045

The shear stress induced migration of planar 〈1
0
0〉 tilt grain boundaries in Al bicrystals was observed to be perfectly coupled to the lateral translation of grains. Boundaries with misorientations of 10.5° and 12.0° on one side of the misorientation range (0–90°) and 81.0° and 81.1° on its other side move in opposite directions under the same applied external stress. The measured ratios of the normal to the lateral motion comply perfectly with the coupling factors of a recently proposed model of boundary motion.