"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Effects of severe plastic deformation on microstructure and mechanical properties of phosphorous sintered steel parts

V. CHERTES1,* , R. L. ORBAN1, I. VIDA-SIMITI1, D. SALOMIE1

Affiliation

  1. Technical University of Cluj-Napoca, Department of Materials Engineering 103-105 Muncii Blv., Romania

Abstract

Severe Plastic Deformation (SPD) became a known method for crystal grain of metals refining, improving, on this way, their mechanical properties. However, up to day, its application to sintered materials has been less investigated, in spite of its high potential of crystal grain refining but also of densification by pore closing. Consequently, the possibility of its application to sintered structural steel parts, in conditions of preserving their required shape and dimensions, is being considered in this paper. By analysing the known SPD variants, one was established that the most appropriate for this purpose is a combination of Constrained Groove Pressing (CGP) with Bulk Mechanical Alloying (BMA). It consists in sintered part repressing in a die of similar, but larger cavity, of the required final dimensions, producing compression and shear stresses and transverse deformation with pore closing and microstructure refining. Considering this potential, its application for sintered structural part densification and their grain refinement, parts obtained from one of the most used powder, PASC 60, low alloyed with phosphorous, due to its ability to form a transient liquid phase at sintering, improving, on this way, the sintering process but, facilitating, in the same time, the crystal grain growth, has been investigated..

Keywords

Powder Metallurgy, Severe Plastic Deformation, Microstructure and Mechanical Properties.

Submitted at: April 19, 2012
Accepted at: June 6, 2012

Citation

V. CHERTES, R. L. ORBAN, I. VIDA-SIMITI, D. SALOMIE, Effects of severe plastic deformation on microstructure and mechanical properties of phosphorous sintered steel parts, Journal of Optoelectronics and Advanced Materials Vol. 14, Iss. 5-6, pp. 551-556 (2012)