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TEM Study for Strengthening Mechanisms in Elgiloy

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Abstract:

Elgiloy is Co based alloy (40wt%Co, 20wt%Cr, 15wt%Ni, 14wt%Fe and 7wt%Mo). It was strengthened by cold work and is capable of additional hardening by aging. The effects of solution treatment, cold working and age-hardening on the microstructure of elgiloy were investigated using optical microscope, scanning electron microscope (SEM) and transmission electron microscope (TEM). As rolled strips were solution treated at 1065°C/1hr. These solution treated strips were then reduced 50% by cold rolling. After cold-deformation both є-hcp phase and fcc deformation twins are also considered to coexist at room temperature. The cold worked strips were then age hardened at (450-600)°C. The age hardened strips showed formation of additional є-phase (via α f c c є h c p transformation).

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Advanced Materials XI View Preview

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Periodical:

Key Engineering Materials (Volume 442)

Pages:

268-274

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.442.268

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Online since:

June 2010

Authors:

I.N. Qureshi, S. Rani, F. Yasmin, M. Farooque

Keywords:

Age Hardening, Cold Working, Deformation Twin, Elgiloy

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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