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Advances in Materials Science and Engineering
Volume 2014, Article ID 249174, 9 pages
http://dx.doi.org/10.1155/2014/249174
Research Article

A Study on the Effect of the Boron Potential on the Mechanical Properties of the Borided Layers Obtained by Boron Diffusion at the Surface of AISI 316L Steel

1Instituto Politécnico Nacional, UPIBI, Avenida Acueducto s/n Barrio La Laguna Ticomán, 07340 México, DF, Mexico
2Instituto Tecnológico Superior de Poza Rica, Luis Donaldo Colosio Murrieta s/n, Arrollo del Maíz, 93230 Poza Rica, VER, Mexico
3Universidad Autónoma del Estado de México, Boulevard Universitario s/n, Predio San Javier, 54500 Atizapán de Zaragoza, MEX, Mexico
4Departamento de Ingeniería Química Industrial, IPN-ESIQIE, UPALM Edifício 7, 1er Piso, Zacatenco, 07738 México, DF, Mexico

Received 27 August 2014; Accepted 30 October 2014; Published 24 November 2014

Academic Editor: Ming-Xing Zhang

Copyright © 2014 E. Hernández-Sánchez 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 effect of the boron potential on the thickness and the mechanical properties of borided layers was evaluated. The boron potential was established by means of the available atoms of boron contained in a control volume inside a cylinder. The cylinders were manufactured from AISI 316L steel, and the boriding treatment was performed using the powder pack technique at a temperature of 1273 K over an exposure time of 6 h. Four different internal diameters of the cylinders were evaluated (3.17, 4.76, 6.35, and 7.93 mm). The mechanical properties were evaluated using the Berkovich instrumented indentation technique. The results showed a clear influence of the boron potential on the mechanical properties of the layers. The hardness of the layers was stablished in the range of 16.22 to 21.16 GPa. Young’s modulus values were stablished in the range of 255.96 to 341.37 GPa. Also the fracture toughness and brittleness of the layers reflected the influence of the boron potential supplied during the boriding process. Finally, the influence of the boron potential on the constant of parabolic growth (K) was also established as a function of the inner diameter of the cylinders.