Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1817 - C7-1820
DOI http://dx.doi.org/10.1051/jp4:19937288
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1817-C7-1820

DOI: 10.1051/jp4:19937288

Influence of cold rolling and fatigue on the residual stress state of a metal matrix composite

E. HANUS1, T. ERICSSON1, J. LU2 and F. DECOMPS3

1  Division of Engineering Materials, Department of Mechanical Engineering, Linköping University 581 83 Linköping, Sweden
2  Département Matériaux, Centre Technique des Industries Mécaniques, 52 av. Félix Louat, BP. 27, 60304 Senlis cedex, France
3  Régie Nationale des Usines Renault, Direction de la Recherche, 8-10 av. Emile Zola, 92109 Boulogne Billancourt cedex, France


Abstract
The large difference in the coefficient of thermal expansion between the matrix alloy and the particle in a metal matrix composite gives rise to residual stresses in the material. In the present work the effect of cold rolling and four-point bending fatigue on the residual stress state of a silicon carbide particle reinforced aluminium alloy (AA 2014) has been investigated. The three dimensional stress state measured in both phases : matrix and reinforcement, has been determined by using an X-ray diffraction technique. It was found that cold rolling induces surface compressive macrostresses of about -250 MPa, with a penetration depth around 2 mm. The absolute values of the pseudomacrostresses in both phases are significantly reduced due to the single track rolling. Stress relaxation occurs during four-point bending fatigue.



© EDP Sciences 1993