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An investigation on the solid state sintering of mechanically alloyed nano-structured 90W--Ni--Fe tungsten heavy alloy
Department of Metallurgical and Materials Engineering, University of Engineering and Technology, Lahore.ORCID-id: 0000-0003-4888-6237
2008 (Engelska)Ingår i: International journal of refractory metals & hard materials, ISSN 0958-0611, E-ISSN 2213-3917, Vol. 26, nr 3, s. 145-151Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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 μm 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 °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.

Ort, förlag, år, upplaga, sidor
2008. Vol. 26, nr 3, s. 145-151
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Materialteknik
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URN: urn:nbn:se:ltu:diva-13322DOI: 10.1016/j.ijrmhm.2007.05.011Lokalt ID: c8aa3b70-d701-44cf-b0a6-986cdbc222dcOAI: oai:DiVA.org:ltu-13322DiVA, id: diva2:986275
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Upprättat; 2008; 20150416 (farakh)Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2017-11-24Bibliografiskt granskad

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