Conclusions
The substitutional impurity element composition and content of nonmetallic inclusions in a W-Ni-Fe alloy are affected by their content in the charge starting components. These include salts and oxides or metallic powder components in a state controlled by the corresponding production conditions.
The nonmetallic inclusions in the alloy consist of multicomponent oxides distributed in the bulk as particles of different shape. Their content ranges from 0.1 to 0.4%.
Some impurity elements tend to form segregations and films at Ni-based solid solution grain surfaces. This is the binder of a W-Ni-Fe alloy.
During the alloy deformation process, nonmetallic binder inclusions, characterized by weak adhesive bonds with the matrix, play a role of pseudopores, absorbing slip bands.
Substitutional impurity elements tending to formation of segregations (Mo, S, etc.) lead to brittle intercrystallite failure.
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Translated from Poroshkovaya Metallurgiya, No. 11(251), pp. 72–78, November, 1983.
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Minakova, R.V., Bazhenova, L.G., Verkhovodov, P.A. et al. Effect of impurity element substitution on the failure behavior of a W-Ni-Fe alloy. Powder Metall Met Ceram 22, 932–937 (1983). https://doi.org/10.1007/BF00805553
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DOI: https://doi.org/10.1007/BF00805553