Materials Transactions Online

Materials Transactions, Vol.58 No.04 (2017) pp.701-704
© 2017 The Japan Institute of Metals and Materials

New Type Fe-Mn Based Alloys with Super Elinvar and Invar Characteristics

Tsuyoshi Masumoto1, Shigehiro Ohnuma1, Kazuyuki Sugawara1 and Hisamichi Kimura1

1Public Interest Incorporated Foundation Research Institute for Electromagnetic Materials, Sendai 982-0807, Japan

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.


(Received 2017/01/31; Accepted 2017/02/07; Published 2017/03/25)

Keywords: elinvar, invar, Fe-Mn, antiferromagnetism, Young's modulus, thermal expansion

We were informed that JST had been performing urgent maintenance on J-STAGE service for security measures against the attack from outside on March 8th(JST) and stopping the service from 11 o'clock on the day to 15 o'clock on March 15th. This article was available to view from 15 o'clock on March 15th for the first time afterrestarting. The corrected publication date is March 15, 2017.

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