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Dual-phase nanocrystalline Ni–Co alloy with high strength and enhanced ductility

Published online by Cambridge University Press:  31 January 2011

Liyuan Qin ,
Jianshe Lian ,
Zhonghao Jiang ,
Guoyong Wang  and
Qing Jiang
Qing Jiang
Affiliation:
Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun 130025, China
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Abstract

A dual-phase (DP) Ni–66.7%Co alloy with an average grain size of 16 nm was fabricated by electrodeposition. It exhibited an ultimate tensile strength of 1800–2080 MPa, together with an elongation to failure of 10–15% at room temperature. The remarkable ductility of this DP alloy with critical scale grains was attributed to its sustained high rate of strain hardening. Its fracture surface showed an unexpected deeply dimpled structure similar to that of coarse-grained ductile materials, which also witnesses the improved ductility.

Keywords

AlloyDuctilityNanostructure
Type
Materials Communications
Information
Journal of Materials Research , Volume 25 , Issue 2 , February 2010 , pp. 401 - 405
Copyright
Copyright © Materials Research Society 2010

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