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Advances in Tribology
Volume 2011, Article ID 810254, 16 pages
http://dx.doi.org/10.1155/2011/810254
Review Article

Model of Fracture, Friction, and Wear Phenomena of Porous Iron

Mechanical Technological Faculty, State National Research Politechnical University of Perm, 29 Komsomolskii Avenue, Perm 614990, Russia

Received 16 June 2011; Revised 8 September 2011; Accepted 8 September 2011

Academic Editor: Luca Settineri

Copyright © 2011 A. A. Shatsov 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

Mechanical and tribotechnical features of powdered materials are strongly influenced by pore volume, fracture character, impurities, alloying, concentration inhomogeneity, friction conditions, and other factors. Pores also have influence on acceleration of diffusion processes and reduce undercooled austenite resistance. Annealed in hydrogen, ultra pure iron powder was used to study porous iron features. Toughness fracture and tribotechnical features had nonmonotonic dependence from porosity different from all known dependences got from technical iron powders. Researches brought out the fact that in process of porosity reduction by pressing and annealing cycles, the average dimension of porous is changed. According to the analysis of porous structure were created models of friction, wear, and fracture of pure porous iron.