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Journal of Materials Science

, Volume 14, Issue 10, pp 2404–2410 | Cite as

Metastable order-disorder transition and sigma phase formation in Fe-V binary alloys

  • Jun -Ichi Seki
  • Masuo Hagiwara
  • Tomoo Suzuki
Papers

Abstract

The influence of binary and ternary alloying compositions and heating rate on theσ formation reaction are studied. Several ways are developed to supress the stableα phase formation and to understand the metastable CsCl-type order-disorder transition in Fe-V alloys. The Fe-V ordered phase has a metastable critical transition temperature of between 850 and 880° C at equiatomic composition, and the so called “650° C anomaly” corresponds to the 550° C anomaly in Fe-Co alloys. Theσ formation reaction does not commence most easily at equiatomic composition but at the iron-rich side of the 40 at. % V alloy. The Influence of ternary alloying additions on theσ formation in Fe-V alloys depends on the relative stabilities of the binaryσ phase with iron or vanadium.

Keywords

Ternary Alloy Differential Thermal Analysis Curve Versus Alloy Japan Inst Equiatomic Composition 

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Copyright information

© Chapman and Hall Ltd. 1979

Authors and Affiliations

  • Jun -Ichi Seki
    • 1
  • Masuo Hagiwara
    • 1
  • Tomoo Suzuki
    • 1
  1. 1.Graduate School and Research Laboratory of Precision Machinery and ElectronicsTokyo Institute of TechnologyYokohamaJapan

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