Experimental Observations of Stress-Driven Grain Boundary Migration-Reference-Cited by-同舟云学术

Experimental Observations of Stress-Driven Grain Boundary Migration

Published:2009-12-18 Issue:5960 Volume:326 Page:1686-1690
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Rupert T. J.¹²,Gianola D. S.¹³,Gan Y.⁴,Hemker K. J.¹

Affiliation:

1. Department of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.

2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

3. Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA.

4. Institute for Materials Research II, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.

Abstract

Moving Boundaries Classical models of fine-grained metals view grain boundaries as static objects, but this view has been challenged by recent experimental observations. Drawing on techniques used by the fracture mechanics community, Rupert et al. (p. 1686 ) present experiments on freestanding aluminum films that show specific geometries cause either stress or strain concentrations on deformation. Confirming recent simulations, shear stresses were found to be a key driver of grain boundary motion.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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