Conclusions
The material made of the NiAl powders with the recrystallized structures has low strength and cracking resistance even if its porosity is high, similar to theoretical. This is caused by intercrystalline brittleness. The material with the aggregate structure has higher mechanical properties. Cracking resistance in the brittle-ductile transition range changes in relation to porosity which weakens the load-carrying cross section and localizes deformation.
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Translated from Poroshkovaya Metallurgiya, No. 8(284), pp. 97–104, August, 1986.
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Krasulin, Y.L., Barinov, S.M., Siesar, M. et al. Structure and failure of nickel aluminide powder. Powder Metall Met Ceram 25, 694–699 (1986). https://doi.org/10.1007/BF00796745
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DOI: https://doi.org/10.1007/BF00796745