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     Research Journal of Applied Sciences, Engineering and Technology


Evaluation of Residual Stresses Induced by Face Milling Using a Method of Micro-indents

1F.V. Diaz, 1C.A. Mammana and 2A.P.M. Guidobono
1Departamento de Ingenier
Research Journal of Applied Sciences, Engineering and Technology  2017  2:80-85
http://dx.doi.org/10.19026/rjaset.14.3993  |  © The Author(s) 2017
Received: October 31, 2016  |  Accepted: December 30, 2016  |  Published: February 15, 2017

Abstract

The aim of this study is to determine and evaluate residual stresses induced by face milling in different zones, which are associated with asymmetries in orientation of cutting edge. In this study, a micro-indent method is used to determine these stresses, which were induced in samples of AA 7075-T6 aluminum alloy. The residual displacements were measured, with high accuracy, using a universal measuring machine. This study includes a thorough data analysis using Mohr's circles, which enabled to assess the stress states in all in-plane directions. The results obtained in samples subjected to different combinations of process parameters showed the introduction of compressive normal components for all directions of each zone evaluated. From the high sensitivity of the micro-indent method used, it was possible to detect smaller differences generated between the levels reaching the stress components in the cutting zones evaluated. Furthermore, these differences were similar for all evaluated directions when the highest feed rate was selected. This significant fact, finally, would reveal equivalent differences between asymmetrical zones, regarding the combination of local plastic deformation and heat reaching the milled surface, for all in-plane directions.

Keywords:

Aluminum alloy, face milling, micro-indentation, Mohr's circle, residual stresses,


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Competing interests

The authors have no competing interests.

Open Access Policy

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Copyright

The authors have no competing interests.

ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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