MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Effect of Additive Elements on the Elinvar and Invar Characteristics of Fe–Mn Base Alloys
Kazuyuki SugawaraShigehiro OhnumaTsuyoshi Masumoto
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2018 Volume 59 Issue 6 Pages 897-902

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Abstract

This study investigated the temperature dependence of the Young’s modulus and the thermal expansion of Fe–26 at%Mn base alloys. The addition of a few % of Ti, Mo, Nb, Zr, Ta, or Hf to the alloys limited the temperature coefficient of Young’s modulus to within ±5 × 10−5/K. In alloys with added Nb, Zr, and Hf, the temperature coefficient of thermal expansion was 1 × 10−5/K or less, whereas the Néel temperature was 380 K or greater. Fe–Mn-based alloys containing a few at% of elements from families 4 and 5 of the periodic table exhibited both Elinvar and Inver characteristics at temperatures up to approximately 380 K. The effect on the properties was shown to be correlated with the number of electrons in the outer shell of the added element and its atomic radius.

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© 2018 The Japan Institute of Metals and Materials
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