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Chemical and structural heterogeneity of ingots of molybdenum and tungsten alloys

Conclusions

  1. 1.

    Heterogeneity of the chemical composition and hardness in micro-and macrovolumes is observed in ingots of molybdenum and tungsten alloys. The large carbide inclusions in the ingots are the result of uneven solidification.

  2. 2.

    Prolonged high-temperature annealing partially removes the chemical heterogeneity in ingots of the molybdenum alloy, leading to solution of the large carbides and improving the plasticity. Annealing of the tungsten alloy equalizes the hardness through the section of the ingot.

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Literature cited

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  2. 2.

    V. V. Nikishanov et al., “Effect of heat treatment on structure and some properties of cast tungsten,” in: Metallurgy and Metal Science of Pure Metals [in Russian], No. IX, Atomizdat, Moscow (1971), p. 151.

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    A. M. Zakharov et al., “Study of Mo−Zr−C system,” Izv. Akad. Nauk SSSR, Metally, No. 6, 204 (1970).

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Additional information

All-Union Scientific-Research and Design Institute of Refractory Metals and Hard Alloys. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 7–10, November, 1975.

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Parshikov, V.G., Leitman, M.S., Shchukin, A.A. et al. Chemical and structural heterogeneity of ingots of molybdenum and tungsten alloys. Met Sci Heat Treat 17, 912–915 (1975). https://doi.org/10.1007/BF00679376

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Keywords

  • Carbide
  • Tungsten
  • Molybdenum
  • Structural Heterogeneity
  • Chemical Heterogeneity