Superplastic deformation behaviour of electrodeposited nanocrystalline nickel

Kang Cheung Chan, C. L. Wang, K. F. Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

In this paper, the superplasticity of an electrodeposited nanocrystalline nickel with a grain size of 65 nm was examined under different strain rates and temperatures. A maximum elongation of 550% was obtained at a relatively low temperature of 450°C and a strain rate of 1.67 × 10-3 s-1. The strain rate sensitivity index is found to be >0.5 demonstrating its good superplasticity. The fracture surfaces and the deformed microstructures reveal that significant grain growth occurs during deformation, and it is found that the addition of SiC particles can effectively improve the superplasticity of the material. Experimental results further illustrate that the deformed microstructure is dependent on the strain rate, and the surface morphology of the material is relating to its oxidation phenomenon during deformation.
Original languageEnglish
Pages (from-to)677-682
Number of pages6
JournalMaterials Science and Technology
Volume23
Issue number6
DOIs
Publication statusPublished - 1 Jun 2007

Keywords

  • Fracture
  • Grain growth
  • Microstructure
  • Nanomaterials
  • Superplasticity

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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