Phase transformations in ball milled AISI 316L stainless steel powder and in the steel after sintering

Agnieszka Szymanska 1Dariusz Oleszak 1Agnieszka Grabias 2Krzysztof Sikorski 1Jan Kazior 3

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Institute of Electronic Materials Technology (ITME), Wólczyńska 133, Warszawa 01-919, Poland
3. Cracow University of Technology, Institute of Materials Science and Metal Technology, Kraków, Poland

Abstract

The paper shows the influence of the ball milling process on the structure of 316L stainless steel powder and the influence of sintering process of the powder on the structure of obtained steel. X-ray diffractometry and differential thermal analyze (DTA) results showed that ball milling results in a partial transformation of austenite into martensite. The martensite fraction in the sample was estimated from the Mössbauer spectra. The changes of lattice parameter and crystallite size of austenite were calculated. The powders after milling were compacted and sintered simultaneously by impulse plasma method. The final structure of the sinters was characterized by optical microscopy equipped with computer image analyzer, SEM and X-ray diffractometry.

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

Submitted: 2004-05-21 09:41
Revised:   2009-06-08 12:55
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