MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
New Type Fe-Mn Based Alloys with Super Elinvar and Invar Characteristics
Tsuyoshi MasumotoShigehiro OhnumaKazuyuki SugawaraHisamichi Kimura
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2017 Volume 58 Issue 4 Pages 701-704

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Abstract

In the present study, both excellent Elinvar and Invar characteristics have been found in the antiferromagnetic Fe-Mn based alloys consisting of about 25 mass%Mn and a small amount of Mo, W, Nb, Ta, Ti, Zr and Hf which are belonging to the 4~6 families in the periodic table. The best characteristics obtained in the present study were constant Young's modulus (Elinvar characteristics) of 1 × 10−6 K−1 and a small thermal expansion coefficient (Invar characteristics) of 8 × 10−6 K−1 in the temperature range of 293~353 K under appropriate treatment of cold working and annealing. Such alloys will be expected as applications in a wide field such as precision instruments, electromagnetic devices and controlling devices.

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© 2017 The Japan Institute of Metals and Materials
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