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Synthesis and Properties of High-Manganese Iron-Based Bulk Amorphous Metals as Non-Ferromagnetic Amorphous Steel Alloys

Published online by Cambridge University Press:  11 February 2011

S. Joseph ,
Gary J. Shiflet ,
V. Ponnambalam ,
Veerle M. Keppens ,
R. Taylor  and
G. Petculescu
Gary J. Shiflet
Affiliation:
Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904–4745, USA.
V. Ponnambalam
Affiliation:
Department of Physics, University of Virginia, Charlottesville, VA 22904–4714, USA.
Veerle M. Keppens
Affiliation:
Department of Physics, The University of Mississippi, National Center for Physical, Acoustics, Coliseum Drive, University, MS 38677, USA.
R. Taylor
Affiliation:
Department of Physics, The University of Mississippi, National Center for Physical, Acoustics, Coliseum Drive, University, MS 38677, USA.
G. Petculescu
Affiliation:
Department of Physics, The University of Mississippi, National Center for Physical, Acoustics, Coliseum Drive, University, MS 38677, USA.
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Abstract

High-manganese ferrous-based alloys containing 10–20 at. % Mn have been investigated as prospective iron-based structural amorphous metals with magnetic transition temperatures far below the ambient temperature. Many of these alloys are found to have a high reduced glass transition temperature of 0.6–0.63 and large supercooled liquid region of 40–90 °C. Rod-shaped amorphous samples with diameters reaching 4 mm are obtained by employing simple injection casting. The search for good glass-forming alloys has been guided by an atomistic approach coupled with the realization of low-lying liquidus temperatures via proper alloying. The tensile yield strengths and Vickers hardness of the new amorphous metals far exceed those known in high-strength steel alloys, and the elastic moduli are comparable to those reported for super-austenitic steels. The present high-manganese amorphous Fe-alloys also show promise as very good corrosion-resistant materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 754: Symposium CC – Supercooled Liquids, Glass Transition and Bulk Metallic Glasses , 2002 , CC1.2
Copyright
Copyright © Materials Research Society 2003

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References

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