Conclusions
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1.
Melting of Mo−W alloys with >20% W requires more power than melting of unalloyed molybdenum or tungsten. The power required is highest for melting alloys with 80–85% W.
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2.
Alloys with 17–85% W have considerably finer grains as-cast than unalloyed molybdenum or tungsten; the grains are finest for the most highly alloyed alloy (Mo+56%W).
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3.
With increasing tungsten concentrations the density of Mo−W alloys increases, reaches a peak for the alloy with 60% W, and then declines.
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4.
At low (20°) and high (1800°) temperatures the strength characteristics of Mo−W alloys increase with the tungsten content; at moderate temperatures (400–1600°) the strength is highest for the alloys most highly alloyed. Alloying of molybdenum with tungsten reises the temperature range in which molybdenum exhibits hot shortness. The ductile-britle transition temperature increases most when over 85% W is added.
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Additional information
I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 2–7, November, 1975.
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Ababkov, V.T., Morgunova, N.N., Belyasov, B.D. et al. Alloys of the Mo−W System. Met Sci Heat Treat 17, 907–910 (1975). https://doi.org/10.1007/BF00679375
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DOI: https://doi.org/10.1007/BF00679375