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Enhanced sintering, microstructure evolution and mechanical properties of 316L stainless steel with MoSi(2) addition
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2011 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, Vol. 509, no 35, 8794-8797 p.Article in journal (Refereed) Published
Abstract [en]

Sintering 316L stainless steel to near full density with an appropriate sintering additive can ensure high mechanical properties and corrosion resistance. We present here a sintering approach which exploits the dissociation of ceramics in steels at high temperatures to activate sintering densification to achieve near full dense 316L stainless steel materials. MoSi(2) ceramic powder was used as a sintering additive for pre-alloyed 316L stainless steel powder. Sintering behavior and microstructure evolution were investigated at various sintering temperatures and content of MoSi(2) as sintering additive. The results showed that the sintering densification was enhanced with temperature and MoSi(2) content. The distribution of MoSi(2) was characterized by XMAPs. It was found that MoSi(2) dissociated during sintering and Mo and Si segregated at the grain boundaries. Excess Mo and Si were appeared as separate phases in the microstructure. Above 98% of theoretical density was achieved when the specimens were sintered at 1300 degrees C for 60 min with 5 wt.% MoSi(2) content. The stainless steel sintered with 5 wt.% MoSi(2) exhibited very attractive mechanical properties.

Place, publisher, year, edition, pages
2011. Vol. 509, no 35, 8794-8797 p.
Keyword [en]
316L stainless steel, Sintering, MoSi(2), Microstructure, XMAP, Mechanical properties
National Category
Natural Sciences
URN: urn:nbn:se:su:diva-68023DOI: 10.1016/j.jallcom.2011.06.077ISI: 000293824600033OAI: diva2:471884
authorCount :4Available from: 2012-01-03 Created: 2012-01-02 Last updated: 2012-01-03Bibliographically approved

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Akhtar, Farid
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Department of Materials and Environmental Chemistry (MMK)
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