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Micropillar Compression Deformation of Fe-Zn Intermetallic Compounds in the Coating Layer of Galvannealed Steel

Published online by Cambridge University Press:  25 January 2013

Norihiko L. Okamoto ,
Daisuke Kashioka  and
Haruyuki Inui
Norihiko L. Okamoto
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
Daisuke Kashioka
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
Haruyuki Inui
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Abstract

The deformation behavior of two of the five Fe-Zn intermetallic phases (Γ, Γ1, δ1k, δ1p and ζ), which are formed in the coating layer of galvannealed steel, has been investigated through uniaxial compression tests for single-phase polycrystalline micropillars. The ζ phase is ductile to some extent while the Γ1 phase is brittle. These results are consistent with the Peierls stress estimated from the crystal structures by assuming the primitive Peierls-Nabarro model.

Keywords

scanning electron microscopy (SEM)Znstress/strain relationship

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