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Microhardness of Cu−Ni−Mn alloy reduced by etching reagents

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Conclusions

  1. 1.

    Both the grains and the grain boundaries in Cu−Ni−Mn alloys are hardened when the alloys are precipitation hardened.

  2. 2.

    The assertion made by Dahl and Dreyer that precipitations at the grain boundaries in these alloys take no part in the hardening process is incorrect.

  3. 3.

    When determining microhardness, the possible effects of etching reagents on structural components in alloys which are not corrosion-resistant should be taken into account.

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References

  1. 1.

    O. Dahl and K.L. Dreyer,Z. Metallk. 45, 1954, (6), pp. 342–349.

  2. 2.

    O. Dahl and K.L. Dreyer,Z. Metallk. 47, 1956 (6), pp. 370–378.

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Bobylev, A.V. Microhardness of Cu−Ni−Mn alloy reduced by etching reagents. Met Sci Heat Treat 2, 49–50 (1962). https://doi.org/10.1007/BF00655592

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Keywords

  • Precipitation
  • Structural Component
  • Hardening Process