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Investigation of the VKNA-1V Alloy Obtained by SPS Method with a Preliminary Mechanical Activation of Powders

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Metallurgist Aims and scope

The paper presents the results of structural studies and assessment of the level of bending strength of an alloy based on nickel aluminide (VKNA-1V) obtained by spark plasma sintering of mechanically activated powders of the initial components at different sintering conditions. Sintering temperature was the main variable parameter (range: 1,100 to 1,250°C). It has been established that when the sintering temperature exceeds 1,200°C, the formation of a liquid phase occurs. X-ray diffraction analysis of the studied materials revealed Ni3Al as the main phase. The recommended sintering conditions required to obtain a dense, low-defect billet made of VKNA-1V alloy include sintering at 1,150°C for 5 min under a pressure of 40 MPa. This type of material has an increased level of bending strength at room temperature (σbend = 1,640 MPa) and a microhardness equal to 650 HV.

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  1. Novosibirsk State Technical University, Novosibirsk, Russia

    L. I. Shevtsova

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  1. L. I. Shevtsova
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Correspondence to L. I. Shevtsova.

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Translated from Metallurg, Vol. 67, No. 8, pp. 63–70, August, 2023.

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Shevtsova, L.I. Investigation of the VKNA-1V Alloy Obtained by SPS Method with a Preliminary Mechanical Activation of Powders. Metallurgist 67, 1146–1157 (2023). https://doi.org/10.1007/s11015-023-01606-0

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  • DOI: https://doi.org/10.1007/s11015-023-01606-0

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