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Advances in Materials Science and Engineering
Volume 2016, Article ID 1582490, 12 pages
http://dx.doi.org/10.1155/2016/1582490
Research Article

Effect of a Deep Cryogenic Treatment on Wear and Microstructure of a 6101 Aluminum Alloy

1Department of Automotive Engineering, University of Brasilia, 72444-240 Brasilia, DF, Brazil
2Department of Mechanical Engineering, University of Brasilia, 70910-900 Brasilia, DF, Brazil
3Fraunhofer Institute for Mechanics of Materials IWM, Woehlerstrasse 11, 79108 Freiburg, Germany

Received 14 October 2015; Accepted 5 May 2016

Academic Editor: Francesco Delogu

Copyright © 2016 Volker Franco Steier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this work is to evaluate the effect of a deep cryogenic treatment (DCT) on the wear behavior and on the microstructure of an aluminum alloy. In order to compare the level of improvement on the wear resistance provided by the DCT with a more traditional technique, a test matrix which included DCT, CrN coated specimens, and combinations of both modification methods was conducted. The wear behavior was investigated using microabrasive wear tests. The cryogenic treated specimens proved to have similar low wear rates as the specimens coated with CrN. The most distinct improvement was reached with a combination of both techniques. In the case of the DCT, the performed microstructural analysis identified the generation of additional GP-zones as the reason for the improved wear resistance.