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Indentation Techniques for the Study of Deformation Across Grain Boundaries

Published online by Cambridge University Press:  10 February 2011

K. A. Nibur  and
D. F. Bahr
K. A. Nibur
Affiliation:
Mechanical and Materials Engineering, Washington State University, Pullman Wa
D. F. Bahr
Affiliation:
Mechanical and Materials Engineering, Washington State University, Pullman Wa
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Abstract

The mechanism by which deformation is transferred across grain boundaries and ways in which boundaries of different misorientations impact this process has been studied using indentation testing. This information could be useful in designing texture of nanocrystalline materials to maximize their mechanical properties for specific applications. Atomic force microscopy (AFM) and orientation imaging microscopy (OIM) has been combined to identify slip systems activated around indentations. When indentations are placed near grain boundaries, slip steps can be imaged on both sides of the boundary and the associated slip systems of each grain can be determined. Dislocation pile ups have been observed around indentations near boundaries which do not share a common slip direction with the active slip planes of either grain, and slip steps have been seen to traverse boundaries when these shared slip directions are present.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 778: Symposium U – Mechanical Properties Derived from Nanostructuring Materials , 2003 , U4.10
Copyright
Copyright © Materials Research Society 2002

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