Enhanced low-temperature superplasticity of Ni-Co alloy by addition of nano-Si3Ni4 particles

C. L. Wang, Kang Cheung Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

In this paper, the low-temperature superplasticity of the electrodeposited Si3N4/Ni-Co nanocomposite was investigated for the first time at temperatures ranging from 673 to 823 K and at constant strain rates from 1 × 10-3 to 1 × 10-2 s-1. A maximum elongation of 692% was obtained at a temperature of 723 K and a strain rate of 5 × 10-3 s-1. High-strain rate superplasticity with an elongation of 371% was realized at a temperature of 723 K. It was found that the Si3N4 nanoparticles play an important role in the stability of the microstructure of the Si3N4/Ni-Co nanocomposite. The relatively large superplasticity of the nanocomposite compared to the Ni-Co alloy is discussed. Deformed microstructure, fracture and surface morphology are examined and the deformation mechanism of the composite is discussed.
Original languageEnglish
Pages (from-to)266-269
Number of pages4
JournalMaterials Science and Engineering A
Volume491
Issue number1-2
DOIs
Publication statusPublished - 15 Sep 2008

Keywords

  • Electrodeposition
  • Nanocomposite
  • Ni-Co alloy
  • Superplasticity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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