Metallurgical and Materials Transactions A

, Volume 43, Issue 5, pp 1610–1620

Plastic Deformation in an Amorphous Ni-P Coating

Authors

    • Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education)Northeastern University
  • W. N. Liu
    • Fundamental and Computational Sciences Directorate, Pacific Northwest National Laboratory
  • X. Sun
    • Fundamental and Computational Sciences Directorate, Pacific Northwest National Laboratory
  • W. Y. Xue
    • The State Key Lab of Rolling & AutomationNortheastern University
  • Y. D. Wang
    • School of Materials Science and EngineeringBeijing Institute of Technology
  • L. Zuo
    • Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education)Northeastern University
  • P. K. Liaw
    • Department of Materials Science and EngineeringThe University of Tennessee
Article

DOI: 10.1007/s11661-011-0989-0

Cite this article as:
Shen, Y.F., Liu, W.N., Sun, X. et al. Metall and Mat Trans A (2012) 43: 1610. doi:10.1007/s11661-011-0989-0

Abstract

An experimental and numerical investigation of the hardness and associated plastic deformation in as-deposited and as-annealed nickel-phosphorus (Ni-P) coatings was conducted. In addition to the indentation-deformation behavior, the deformation morphology underneath the indenter was examined. The yield strength extracted from the indentation data is as high as 5.6 GPa, indicating pressure-sensitive plasticity. Results show that the as-deposited Ni-P coating was deformed appreciably through the shear-band mechanism with semicircular and radial shear-band morphologies. From the incremental loading-unloading cyclic experiments, the phenomena on hardening and recovery, which have scarcely been recognized in amorphous materials at room temperature, were observed in the amorphous coating using instrumented nanoindentation. A numerical simulation of the interfacial indentation test between the Ni-P coating and the substrate reveals the pileup and shear bands of the Ni-P coating that were observed during the indentation tests.

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2011