RESIDUAL STRESSES IN SLIDE BURNISHING PROCESS OF SMALL HOLES IN 2024-T3 HIGH-STRENGTH ALUMINIUM ALLOY
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- TITLE: RESIDUAL STRESSES IN SLIDE BURNISHING PROCESS OF SMALL HOLES IN 2024-T3 HIGH-STRENGTH ALUMINIUM ALLOY
- ABSTRACT: The treatment by mixed burnishing of small holes in 2024-T3 high-strength aluminium alloy is a problem in the engineering practice. The mixed burnishing aims to achieve three effects: burnishing, cold working, beneficial residual compressive stresses in a c onsiderable depth. For achieving these effects a special tool has been designed and manufactured, which fulfils slide burnishing. The introduced residual stresses around the burnished small hole can hardly be measured experimentally, having in mind the small hole and the compressive zone depth. In this case, the use of FEM with an adequate finite-element model solves the difficulties of the experimental methods. This article presents the outcomes from numerical simulation (FEM) of slide burnishing of small holes in 2024-T3 aluminium alloy by a new tool. The residual stress (hoop, radial, axial) distribution around burnished small hole has been obtained. It has been established that the new tool introduces compressive residual stresses in considerable depth.
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