Title

Theory of Grain Boundary Structure Effects on Mechanical Behavior

Document Type

Article

Journal/Book Title/Conference

Materials Science Forum

Volume

157

Publisher

Trans Tech Publications

Publication Date

1994

First Page

1731

Last Page

1738

Abstract

Described in this paper are elements of emerging theories for the mechanical behavior of polycrystals which influence elastic and plastic behavior through details of the spatial placement of lattice orientation. The approach taken here through the two-point statistics of placement of lattice orientation. Although explicit connections between statistical and exact representations of microstructure are not achieved, it is argued that grain boundary structure plays a dominant role, in theories which extend beyond the well-known first-order theories which incorporate only a volume-fraction representation of microstructure. As an example the effects which are predicted by the theory, the spatial placement of the well-known copper and brass components of rolling texture in fee metals is considered. It is demonstrated that spatial placement of lattice orientation can have strong effects upon components of the effective elastic stiffness tensor, yield strength, the local curvature of the yield surface, and the scatter of these properties.

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