Introduction and Application of Tungsten Heavy Alloys III

WHAs(tungsten heavy alloys) have been widly used for apparatus and instrument in medical, military and airspace industries.

The majority of current uses for WHAs (tungsten heavy alloys) are best satisfied with the W-Ni-Fe system. Tungsten heavy alloys such as 93W-4.9Ni-2.lFe and 95W-4Ni-lFe represent common compositions. The addition of cobalt to a W-Ni-Fe alloy is a common approach for slight enhancement of both strength and ductility. The presence of cobalt within the alloy provides solid-solution strengthening of the binder and slightly enhanced tungsten-matrix interfacial strength. Cobalt additions of 5 to 15% of the nominal binder weight fraction arc most common.


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