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Mechanical and structural characterization of uniaxially cold-pressed Fe2Mo powders

Published online by Cambridge University Press:  31 January 2011

R. Morales ,
S. Seetharaman  and
V. Agarwala
R. Morales
Affiliation:
Department of Materials Science and Engineering, Division of Metallurgy, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
S. Seetharaman
Affiliation:
Department of Materials Science and Engineering, Division of Metallurgy, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
V. Agarwala
Affiliation:
Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Roorkee, 247667, Uttaranchal, India
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Abstract

In this work, Fe2Mo intermetallic powder, produced by H2 gas reduction of Fe2MoO4 was characterized by techniques like x-ray diffraction (XRD) and transmission electron microscopy (TEM). The TEM studies confirmed the presence of nano- and microcrystalline grains of Fe2Mo. The above powders when compressed uniaxially showed a logarithmic relation with “relative density”, δr, of the compacts. The multiple compaction mechanisms were analyzed by Kawakita's and Balshin's models. Vickers hardness number, VHN, was found to increase linearly with δr of the compacts. The hardness of Fe2Mo intermetallic when δr = 1 was estimated as 343 VHN. Using Tabor's analysis, the yield strength of Fe2Mo was found to be about 1100 MPa. This value was further confirmed from the details of relative broadening (112) Bragg peak of Fe2Mo obtained from XRD analyses of Fe2Mo at different compaction pressures.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 8 , August 2002 , pp. 1954 - 1959
Copyright
Copyright © Materials Research Society 2002

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