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

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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.

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Authors and Affiliations

  1. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun, 130025, China

    Liyuan Qin, Jianshe Lian, Zhonghao Jiang, Guoyong Wang & Qing Jiang

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  1. Liyuan Qin
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  2. Jianshe Lian
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  3. Zhonghao Jiang
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  4. Guoyong Wang
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  5. Qing Jiang
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Correspondence to Jianshe Lian.

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Qin, L., Lian, J., Jiang, Z. et al. Dual-phase nanocrystalline Ni–Co alloy with high strength and enhanced ductility. Journal of Materials Research 25, 401–405 (2010). https://doi.org/10.1557/JMR.2010.0048

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  • DOI: https://doi.org/10.1557/JMR.2010.0048

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