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Influence of heterogeneities with different length scale on the plasticity of Fe-base ultrafine eutectic alloys

Published online by Cambridge University Press:  31 January 2011

Jin Man Park ,
Do Hyang Kim ,
Ki Buem Kim ,
Min Ha Lee ,
Won Tae Kim  and
Jürgen Eckert
Jin Man Park
Affiliation:
Center for Non-Crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Republic of Korea
Do Hyang Kim*
Affiliation:
Center for Non-Crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Republic of Korea
Ki Buem Kim
Affiliation:
Department of Advanced Materials Engineering, Sejong University, Seoul 143-747, Republic of Korea
Min Ha Lee
Affiliation:
Leibniz Institute for Solid State and Materials Research Dresden, Institute for Complex Materials, D-01171 Dresden, Germany; and Advanced Materials Division, Korea Institute of Industrial Technology, Incheon 406-840, Korea
Won Tae Kim
Affiliation:
Division of Applied Science, Cheongju University, Cheongju 360-764, Republic of Korea
Jürgen Eckert
Affiliation:
Leibniz Institute for Solid State and Materials Research Dresden, Institute for Complex Materials, D-01171 Dresden, Germany; and TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The evolution of microstructure and its influence on the mechanical properties of high-strength ultrafine eutectic Fe–(Ti, Zr)–(B, Co) alloys has been studied. The addition of B or Co improves the room temperature compressive plasticity from 1% to ∼8.5% or ∼14%, respectively, due to the formation of a heterogeneous microstructure with distinctly different length scales, which can delay the propagation of shear bands and promotes the activation of multiple shear bands.

Keywords

FeNanostructureStrength
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 7 , July 2008 , pp. 2003 - 2008
Copyright
Copyright © Materials Research Society 2008

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References

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