Enhancement of Thermal Expansion Anomaly in Fe-B Amorphous Invar Alloys by Cold Rolling

  • K. Fukamichi
  • H. M. Kimura
  • M. Kikuchi
  • T. Masumoto


Fe-B amorphous alloys were prepared from the melt by rapid quenching method. These specimens were annealed or cold-rolled. The saturation magnetization and the Curie temperature were almost independent of the ratio of cold rolling. However, the anomaly in the thermal expansion below the Curie temperature of Fe83B17 amorphous alloy was remarkably enhanced by cold rolling, accompanying a negative thermal expansion in a wide temperature range. This enhancement was pronounced with the increase in the ratio of cold rolling. Such thermal expansion behaviors are very similar to those of Fe-Ni crystalline Invar alloys. The crystallized specimen showed no Invar characteristics, indicating a large thermal expansion such as that of normal metals and alloys.


Thermal Expansion Curie Temperature Amorphous Alloy Invar Characteristic Negative Thermal Expansion 
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Copyright information

© Purdue Research Foundation 1982

Authors and Affiliations

  • K. Fukamichi
    • 2
  • H. M. Kimura
    • 2
  • M. Kikuchi
    • 2
    • 1
  • T. Masumoto
    • 2
  1. 1.The Research Institute of Electric and Magnetic AlloysSendai, 82Japan
  2. 2.The Research Institute for Iron, Steel and Other MetalsTohoku UniversitySendai, 980Japan

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