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Study of Residual Stress Tensors in High-Speed Milled Specimens of Aluminium Alloys Using a Method of Indent Pairs

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Author(s): Felipe Víctor Díaz | C.A. Mammana; A.P.M. Guidobono and R.E. Bolmaro

Journal: Research Journal of Applied Sciences, Engineering and Technology
ISSN 2040-7459

Volume: 2;
Issue: 8;
Start page: 749;
Date: 2010;
Original page

Keywords: Aluminium alloys | climb cutting | conventional cutting | high speed milling | process parameters | residual stresses

ABSTRACT
From data obtained using a method of indent pairs it was possible to analyse different residual stress states generated in high-speed milled specimens of AA 6082-T6 and AA 7075-T6 aluminium alloys. The present method integrates a special device of indentation into a universal measuring machine, allowing the introduction of elongated indents to significantly reduce the absolute error of measurement. Diverse protocols for operations of high-speed face milling allow us to compare residual stress tensors inherent to climb and conventional cutting zones. Through an exhaustive analysis of the Mohr’s circles corresponding to those zones, a relationship was detected, which expresses the sensitivity of both alloys to develop surface residual stresses.
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