| Issue |
ESOMAT 2009
2009
|
|
|---|---|---|
| Article Number | 06032 | |
| Number of page(s) | 4 | |
| Section | Applied Research and Applications: Testing and Modelling | |
| DOI | https://doi.org/10.1051/esomat/200906032 | |
| Published online | 01 September 2009 | |
DOI: 10.1051/esomat/200906032
Relation between crystal quality and fatigue life of a Cu-Al-Be single crystal shape memory alloy under repeated bending.
N. Siredey-Schwaller1, A. Eberhardt1, E. Patoor2 and P. Bastie3, 41 Laboratoire de Physique et Mécanique des Matériaux, FRE CNRS 3236, ISGMP, Ecole Nationale d’Ingénieurs de Metz, Ile du Saulcy, F- 57045 Metz cedex 01, France
2 Laboratoire de Physique et Mécanique des Matériaux, FRE CNRS 3236, ISGMP, ENSAM, 57 Metz cedex, France
3 Laboratoire de Spectrométrie Physique, BP 87, 38402 Saint Martin d’Hères cedex, France
4 Institut Laue-Langevin, BP 156, 38042 Grenoble cedex 9, France
nathalie.siredey@univ-metz.fr
Published online: 1 September 2009
Abstract
The purpose of this study is to determine the parameters influencing the life of single crystalline Cu-Al-Be shape memory alloys. A strong correlation is found between crystal quality and fatigue life. For that purpose, a special device located at ILL (Institut laue-langevin) in Grenoble is employed. This device is a hard X-ray diffractometer using a transposition at high energy of the Guinier-Tennevin method. Thanks to these X-ray studies, it is found that mechanical lifespan is very sensitive to crystalline quality. In presence of sub-grains (even if disorientation between subgrain is lower than 3°) or in presence of mosaïcity (distribution of the orientation of reticular planes around a mean value), the lifespan can be reduce by a factor of 10.
© Owned by the authors, published by EDP Sciences 2009