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Weight loss behavior of a vacuum sintered powder metallurgical Fe–Mn–Si alloy

Published online by Cambridge University Press:  05 January 2017

Zhigang Xu ,
Michael A. Hodgson  and
Peng Cao
Zhigang Xu
Affiliation:
Department of Chemical and Materials Engineering, University of Auckland, Auckland1142, New Zealand
Michael A. Hodgson
Affiliation:
Department of Chemical and Materials Engineering, University of Auckland, Auckland1142, New Zealand
Peng Cao*
Affiliation:
Department of Chemical and Materials Engineering, University of Auckland, Auckland1142, New Zealand
*
a)Address all correspondence to this author. e-mail: p.cao@auckland.ac.nz
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Abstract

This work presents the effects of sintering temperature and mechanical milling on the weight loss of the powder metallurgical Fe–28Mn–3Si (wt%) alloy. Mechanically milled (MM) and blended elemental (BE) Fe–28Mn–3Si powder mixtures were prepared. Both the MM and BE compacts were sintered in a vacuum furnace for 3 h at various temperatures. It was found that weight loss occurred among all the sintered compacts. The weight loss of the sintered MM compacts was much lower than their BE counterparts sintered at the same temperature. The weight loss of the compacts was mainly caused by the sublimation of Mn in the Mn depletion region. A single α-Fe phase was observed on the surface of all the sintered samples. Predominant γ-austenite and minor ε-martensite were detected in all the sintered compacts at locations beyond the Mn depletion region. Mn3Si phase was found in BE alloys sintered at 1000 °C.

Keywords

powder metallurgyMnsintering
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 3 , 14 February 2017 , pp. 644 - 655
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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