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Influence of Grain Interaction on the Mechanical Behavior in Shape Memory Material in Flexion Test

Published online by Cambridge University Press:  01 February 2011

Jacinto Cortés ,
Fernando N. García ,
José G. González ,
Horacio Flores  and
Alberto Reyes
Jacinto Cortés
Affiliation:
Centro Tecnológico Aragón, FES Argón, UNAM. Edo. de México, México, C. P. 57130.
Fernando N. García
Affiliation:
Centro Tecnológico Aragón, FES Argón, UNAM. Edo. de México, México, C. P. 57130.
José G. González
Affiliation:
Instituto de Investigaciones en Materiales, UNAM. México D.F. México.
Horacio Flores
Affiliation:
Maestría en Procesos y Materiales, Universidad Autónoma de Zacatecas, Zacatecas, México.
Alberto Reyes
Affiliation:
IME, FES Aragón, UNAM. Edo. de México, México, C. P. 57130.
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Abstract

An experimental study of the mechanical properties of a Cu-Al-Be shape memory alloy is presented. The samples are tested in a cantilever arrangement. They consist of polycrystalline thin plates of shape memory material with a MS near 0 °C and a monocrystalline sample with MS near −90 °C. The measurements are made with strain gauges attached to the top side of the samples. In these conditions, strain Vs load curves are obtained. A polycrystalline sample is instrumented and tested and then it is cut into three samples for further testing. The results show a relationship between the transformation stress and the sample grain size which differs from the typical Hall-Petch relationship. The analysis of transformation plane stress diagrams shows the development of a stress component perpendicular to those induced by the applied load.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1243: Symposium 5 – Advanced Structural Materials , 2009 , 17
Copyright
Copyright © Materials Research Society 2010

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References

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