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Proceedings Paper

Energetics in martensites
Author(s): Oscar P. Bruno
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Paper Abstract

Martensitic transformations are shape-deforming phase transitions which can be induced in certain alloys as a result of changes in the imposed strains, stresses or temperatures. The interest in these alloys, which undergo a shape-deforming phase transition form a high temperature phase to a low temperature phase, stems in part from their applicability as elements in active structures. In this paper we focus on the energy transfers that accompany the martensitic phase change. We discuss, in three concrete examples, the ways in which temperature, together with the elastic and dissipated energies, determine the equilibria as well as the quasi-static dynamics in martensites. Thus, in (xi) 1 we consider the pseudoelastic hysteresis in shape- memory wires; our treatment draws from (7, 3). In (xi) 2, on the other hand, we follow and discuss equilibrium configurations in polycrystalline martensitic polycrystals. In (xi) 3, finally, we present some new theoretical computations for certain typical microstructural lengthscales, the twin widths, observed in single- crystalline martensite twinning.

Paper Details

Date Published: 13 June 1997
PDF: 11 pages
Proc. SPIE 3039, Smart Structures and Materials 1997: Mathematics and Control in Smart Structures, (13 June 1997); doi: 10.1117/12.276557
Show Author Affiliations
Oscar P. Bruno, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 3039:
Smart Structures and Materials 1997: Mathematics and Control in Smart Structures
Vasundara V. Varadan; Jagdish Chandra, Editor(s)

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