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Structure and properties of iron-nickel invar sintered alloys
https://doi.org/10.22349/1994-6716-2019-99-3-07-13
Abstract
The structure and physicomechanical properties of iron-nickel invar alloys obtained by sintering powders are investigated. It is shown that during sintering of iron and nickel powders, an alloy with a facecentered cubic structure is formed, whose lattice parameters correspond to invariant compositions. The resulting invar alloys are characterized by hardness, Young’s modulus, and thermal expansion coefficient comparable with the literature data. The Young’s modulus is in the range from 83 to 126 GPA, depending on the composition and sintering temperature, the coefficient of thermal expansion in the temperature range from 0 to 150°C is 1.1·10–6°C–1, in the temperature range from 300 to 500°С is 15.8·10–6°С–1. It is shown that a phase transition occurs associated with the loss of magnetic properties at a temperature of 225°C.
Keywords
iron-nickel alloys,
invar alloys,
sintering,
microstructure,
Young’s modulus,
hardness,
linear thermal expansion coefficient,
phase composition
Supporting agencies: The work was financially supported by the grant of Russian Foundation for Basic Research (RFBR) No 18-48-700039 r_a.
About the Authors
E. V. Abdulmenova
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences (ISPMS SB RAS),
National Research Tomsk Polytechnic University (NR TPU)
Russian Federation
2/4 Akademichesky Ave., 634055 Tomsk, Russian Federation
30 Lenina Ave., 634034 Tomsk, Russian Federation
Russian Federation
2/4 Akademichesky Ave., 634055 Tomsk, Russian Federation
30 Lenina Ave., 634034 Tomsk, Russian Federation
O. Yu. Vaulina
National Research Tomsk Polytechnic University (NR TPU)
Russian Federation
Cand. Sc. (Eng.)
30 Lenina Ave., 634034 Tomsk, Russian Federation
Russian Federation
Cand. Sc. (Eng.)
30 Lenina Ave., 634034 Tomsk, Russian Federation
S. N. Kulkov
Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences (ISPMS SB RAS),
National Research Tomsk Polytechnic University (NR TPU)
Russian Federation
Russian Federation
Dr. Sc. (Phys.-Math.)
2/4 Akademichesky Ave., 634055 Tomsk, Russian Federation
30 Lenina Ave., 634034 Tomsk, Russian Federation
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Review
For citations:
Abdulmenova E.V., Vaulina O.Yu., Kulkov S.N. Structure and properties of iron-nickel invar sintered alloys. Voprosy Materialovedeniya. 2019;(3(99)):7-13. (In Russ.) https://doi.org/10.22349/1994-6716-2019-99-3-07-13
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