Study of residual stress distribution by the combination of three techniques in an aluminium based MMC

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

4 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)498-503
Journal / PublicationMaterials Science Forum
Volume347-349
Online published21 May 2000
Publication statusPublished - 2000
Externally publishedYes

Conference

Title5th European Conference on Residual Stresses (ECRS5)
PlaceNetherlands
CityNoordwijkerhout
Period28 - 30 September 1999

Abstract

The mechanical behaviour of metal matrix composites (MMCs) under dynamic loading is commonly improved by surface treatments like cold-rolling or shot-peening. In this paper, we focus on a new mechanical surface treatment: ultrasonic shot-peening. Residual stresses generated by ultrasonic and conventional shot-peening in an aluminium matrix alloy (Al 7075) reinforced with 27 vol.% SiC whiskers are investigated. To this end, three complementary techniques are used. On the one hand, the X-ray and neutron diffraction methods allow surface and in depth measurements respectively and give information on both the matrix and the reinforcement residual stress field. On the other hand, the step by step hole drilling method is applied to study the macroscopic residual stress gradient generated in the MMC. The aim of this work is to compare the residual stress gradients induced by ultrasonic and conventional shot-peening in an aluminum MMC and to conclude if the ultrasonic shot-peening process can lead to the same order of prestressed thickness than conventional shot-peening.

Research Area(s)

  • Hole Drilling Method, Metal Matrix Composite (MMC), Neutron Diffraction, Residual Stress, Ultrasonic Shot-Peening, X-Ray Diffraction