Journal Published Online: 01 July 1995
Volume 17, Issue 3

Study of the Residual Stress in Cold-Rolled 7075 Al-SiC Whisker-Reinforced Composites by X-Ray and Neutron Diffraction

CODEN: JCTRER

Abstract

Many surface treatment techniques are used to improve the mechanical behavior of metal matrix composites (MMC) under dynamic loading. Mill machining, shot-peening, hammering, and cold-rolling are the four techniques commonly used. In this paper, we study the effect of the surface treatment with the cold-rolled technique on the residual stresses in an aluminum alloy 7075 reinforced with 27% vol fraction SiC whiskers.

The techniques used to measure the residual stresses are X-ray and neutron diffraction methods. Neutron diffraction is a nondestructive technique that allows one to evaluate the residual stresses in both the Al matrix and the SiC whiskers. The X-ray technique was used to evaluate the residual stresses at the surface of the composite material. The results show us that the cold-rolled treatment induced a steep stress gradient near the surface. The comparison of using the two different measuring techniques will be discussed.

Author Information

Li, J
Laboratoire Science des Matériaux, Université de Reims Champagne-Ardenne, France
Lu, J
Genie System Mécanique, U.T.T., Troyes, France
Perrin, M
Laboratoire Leon Brillouin, CEA-CNRS, CEN-Saclay, Gif sur Yvette Cedex, France
Ceretti, M
Laboratoire Leon Brillouin, CEA-CNRS, CEN-Saclay, Gif sur Yvette Cedex, France INFM, UdR Ancona, Italy
Lodini, A
Laboratoire Science des Matériaux, Université de Reims Champagne-Ardenne, France Laboratoire Leon Brillouin, CEA-CNRS, CEN-Saclay, Gif sur Yvette Cedex, France
Pages: 5
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Stock #: CTR10482J
ISSN: 0884-6804
DOI: 10.1520/CTR10482J