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http://dx.doi.org/10.3365/KJMM.2011.49.9.720

Effect of Fe7W6 Phase (μ-phase) on Mechanical Properties of W-Ni-Fe Heavy Alloy  

Jeon, Yong Jin (Department of Materials Science and Engineering, Hanyang University)
Kim, Se Hoon (Department of Materials Science and Engineering, Hanyang University)
Kim, Young Do (Department of Materials Science and Engineering, Hanyang University)
Publication Information
Korean Journal of Metals and Materials / v.49, no.9, 2011 , pp. 720-725 More about this Journal
Abstract
W-Ni-Fe heavy alloys have been used in various fields, such as kinetic energy penetrators and radiation shielding materials, due to their high density and good mechanical properties. In this study, the sintering of W-Ni-Fe alloys with various Ni/Fe ratios was demonstrated to improve the mechanical properties and penetration capabilities of heavy alloys by formation of interfacial phase. The microstructural changes and the mechanical properties of the W-Ni-Fe alloys after liquid-phase sintering were investigated. The Vickers hardness and tensile strength of the 95W1.3Ni3.7Fe sample, which had coated W grains by $Fe_7W_6$ phase (${\mu}$-phase), were 450 Hv and 1560 MPa, respectively. As a result, enhancement of the mechanical properties was considered to have uniformly generated ${\mu}$-phase around W grains.
Keywords
composites; sintering; microstructure; hardness test; compression test;
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