The influence of hydrostatic extrusion on mechanical properties and tribological characteristics of an austenitic stainless steel

Julia A. Budniak 1,  Malgorzata Lewandowska 1,  Waclaw Pachla 2,  Mariusz Kulczyk 2,  Krzysztof J. Kurzydlowski 1

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Polish Academy of Sciences, Institute of High Pressure Physics (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland

Abstract

Austenitic stainless steels are widely used in various fields of engineering and biomedical applications. From this point of view, the improvement of their mechanical properties is of great importance. This can be achieved by grain refinement using one of the severe plastic deformation (SPD) methods. It has been recently shown that hydrostatic extrusion (HE) is one of efficient SPD methods. The aim of this work was to study mechanical properties and tribological characteristics of the 316 LVM austenitic stainless steel subjected to HE process.
The mechanical properties were characterized by microhardness measurements and compression tests. Wear properties were investigated using pin-on-disc tribometer under dry and lubricated conditions. The relation between friction coefficient and time was determined.
The results indicate that hydrostatic extrusion process significantly improves mechanical properties as well as wear resistant of the 316 LVM stainless steel. The results were discussed in terms of microstructural evolutions occurring during processing by hydrostatic extrusion.

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Presentation: poster at E-MRS Fall Meeting 2005, Symposium I, by Julia A. Budniak
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-05-20 14:33
Revised:   2005-05-20 14:34
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