Sintering transformations in mixtures of austenitic and ferritic stainless steel powders

The microstructural transformations and the dimensional evolution of green specimens obtained by pressing mixtures of austenitic and ferritic stainless steel powders have been investigated by sintering at 1120 and 1240°C. Dilatometry experiments show that the linear shrinkage is influenced by the am...

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Veröffentlicht in:	Powder metallurgy 2001-01, Vol.44 (1), p.48-52
Hauptverfasser:	Marcu Puscas, T., Molinari, A., Kazior, J., Pieczonka, T., Nykiel, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Cross-disciplinary physics: materials science rheology Exact sciences and technology Materials science Materials synthesis materials processing Metals. Metallurgy Physics Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation
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Beschreibung
Zusammenfassung:	The microstructural transformations and the dimensional evolution of green specimens obtained by pressing mixtures of austenitic and ferritic stainless steel powders have been investigated by sintering at 1120 and 1240°C. Dilatometry experiments show that the linear shrinkage is influenced by the amount of ferritic powder. Moreover, during sintering Ni diffuses into the ferritic grains causing austenite destabilisation and the formation of a mixed constituent, whose constitution has been investigated by means of EDXS and interpreted on the basis of the Schaeffler diagram. Sigma phase also forms during sintering of the duplex mixtures.
ISSN:	0032-5899 1743-2901
DOI:	10.1179/003258901666167