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Magnetic properties and structure of Mn-Al alloys with carbon

  • Precision Steels and Alloys
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Metal Science and Heat Treatment Aims and scope

Conclusions

  1. 1.

    Alloying of Mn−Al alloys with carbon (0.4–0.7%) leads to substantial improvement of the cast structure and grain refining.

  2. 2.

    The limit solubility of carbon in the original ε phase is ∼1%. Anomalous grain growth and differences in grain sizes are observed at this carbon concentration.

  3. 3.

    Formation of ferromagnetic τ phase is observed at all carbon concentrations investigated. The solubility of carbon in τ phase does not exceed 0.4–0.6%. Alloying with carbon increases the stability of τ phase and suppresses its decomposition to equilibrium phases.

  4. 4.

    Alloying with carbon increases the remanence and coercive force of Mn−Al alloys. The coercive force increases sharply at carbon concentrations higher than its limit solubility in τ phase.

  5. 5.

    Alloying of Mn−Al alloys with 0.7% C ensures the optimal combination of a homogeneous fine-grained cast structure favorable for deformation and fairly high magnetic properties.

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Literature cited

  1. M. P. Ravdel', M. V. Veller, and Yu. S. Konyaev, "Effect of deformation on the structure and properties of high-coercivity Mn−Al alloys," Izv. Akad. Nauk SSSR, Met., No. 1, 189 (1974).

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Authors
  1. T. S. Rodina
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  2. M. P. Ravdel'
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Additional information

I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 41–43, April, 1979.

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Rodina, T.S., Ravdel', M.P. Magnetic properties and structure of Mn-Al alloys with carbon. Met Sci Heat Treat 21, 295–299 (1979). https://doi.org/10.1007/BF00775114

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  • DOI: https://doi.org/10.1007/BF00775114

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