The influence of twin bands density on microstructure of 316LVM austenitic stainless steel subjected to transverse rolling

Dominika Klassek 1Malgorzata Lewandowska 1Tomasz Wejrzanowski 1Jacek Pawlicki 2Krzysztof J. Kurzydlowski 1

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Silesian University of Technology, Department of Process Modelling and Mechanical Engineering, Katowice, Poland

Abstract

Standard metallic orthopedic materials include stainless steel, cobalt-based alloys, commercially pure titanium and titanium-based alloys. Although Ti and its alloys are preferred nowadays, stainless steel is still the most used metal for internal fixation devices. This is due to its useful combination of mechanical properties, acceptable biocompatibility and cost effectiveness in comparison to other metallic implant materials.
Recent development in fabrication of bulk nanostructured metals opens possibility to obtain novel properties in austenitic stainless steels. The paper presents the results of investigations of the properties and microstructure of 316LVM stainless steel subjected to transverse rolling in DUO process [1].
The specimens of the steel prior to rolling have been deformed via hydrostatic extrusion [2]. Microstructures of the DUO processed steel were investigated by light and transmission electron microscopy. The initial and post-rolling microstructure parameters were estimated using special software (MICROMETER [3]). Mechanical properties were described in terms of microhardness. The microstructures observed in the rolled material showed a considerable refinement of grain size, which affects mechanical properties of the studied material. High microstructure inhomogenity has been observed.

[1] Grosman F, Pawlicki J, Korbel A, Bochniak W, Kielpiński R, Tomecki L, Patent Declaration No: P-361148, 2003
[2] Klassek D, Garbacz H, Lewandowska M, Pachla W, Kurzydlowski KJ, The influence of hydrostatic extrusion on microstructure and mechanical properties of austenitic stainless steel for biomedical applications, in press
[3] Wejrzanowski T, M.Sc. Thesis. Warsaw University of Technol
[ABSTRACT TRUNCATED TO 2000 LETTERS]

 

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Presentation: poster at E-MRS Fall Meeting 2004, Symposium I, by Dominika Klassek
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-05-20 14:17
Revised:   2009-06-08 12:55