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Cu redistribution during sintering of Fe-2Cu and Fe-2Cu-0·5C compacts
KTH Royal Institute of Technology.
KTH Royal Institute of Technology.
KTH Royal Institute of Technology.
Höganäs AB.
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2014 (English)In: Powder Metallurgy, ISSN 0032-5899, E-ISSN 1743-2901, Vol. 57, no 5, 373-379 p.Article in journal (Refereed)
Abstract [en]

The effective use of alloying elements in powder metallurgical steels requires a deep understanding of their redistribution kinetics during sintering. In this work, interrupted sintering trials of Fe-2Cu and Fe-2Cu-0·5C compacts were performed. Moreover, diffusion simulations of Cu in c-Fe using Dictra were performed. It is found that transient liquid phase penetrates the Fe interparticle and grain boundaries in less than 3 min of holding time. However, C addition limits the penetration of liquid Cu, particularly into grain boundaries of large Fe particles. The results also show that the mean diffusion distance of Cu in c-Fe in the C added system is slightly lower than that in the C-free system at 3 min of holding time; however, after 33 min, the mean diffusion distance is similar in both systems. The diffusion distances of Cu in c-Fe, predicted by Dictra, are in good agreement with the measured values. © 2014 Institute of Materials, Minerals and Mining.

Place, publisher, year, edition, pages
2014. Vol. 57, no 5, 373-379 p.
Keyword [en]
Cu redistribution kinetics, Dictra, Diffusion, Dilatometry, Microstructure, Powder metallurgical steels, SEM/EDXS, Wetting
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12802DOI: 10.1179/1743290114Y.0000000085Scopus ID: 2-s2.0-84919432962OAI: oai:DiVA.org:ri-12802DiVA: diva2:972995
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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