Conclusions
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1.
Separate additions of cerium, lanthanum, neodymium, and praseodymium to alloy EI437 produce a substantial increase in the strength and plasticity of metal in long- and short-time tensile tests at 700°, and also reduce the total contents of gases in the metal.
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2.
The maximum effect of rare-earth metals is observable when the residual amount of the injected addition does not exceed 0.02%.
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3.
By the effectiveness of their influence on the rupture strength of alloy EI43V the investigated elements range in the order corresponding to their progressively increasing melting points.
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References
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Svistunova, T.V., Estulin, G.V. Effect of rare earth metals on the properties of heat-resistant nickel-chrome alloy. Met Sci Heat Treat 3, 432–434 (1961). https://doi.org/10.1007/BF00812603
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DOI: https://doi.org/10.1007/BF00812603