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An investigation on the solid state sintering of mechanically alloyed nano-structured 90W-Ni-Fe tungsten heavy alloy

Akhtar, F. (2008) An investigation on the solid state sintering of mechanically alloyed nano-structured 90W-Ni-Fe tungsten heavy alloy. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS , 26 (3). pp. 145-151. ISSN 0263-4368

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Abstract

In this study, 90W-7Ni-3Fe heavy alloy was investigated for its microstructure development, mechanical properties and fracture behavior after solid state sintering. The nano-sized powders were synthesized by mechanical alloying (MA). The microstructure of solid state sintered heavy alloys consisted of tungsten matrix. The average tungsten grain size in the range of 1.7-3.0 mu m was obtained. It was found that the grain size largely affected the mechanical properties. Tensile strength more than 1200 MPa was achieved at a sintering temperature of 1350 degrees C. Fracture mechanisms based on microscopical observations on the fracture surfaces were studied. Matrix failure, tungsten-intergranular cleavage and tungsten-matrix interfacial separation were found to be the possible failure mechanisms. (C) 2007 Elsevier Ltd. All rights reserved.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:7736
Deposited By:JNCASR
Deposited On:16 Nov 2009 09:40
Last Modified:16 Nov 2009 09:40

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