Microstructural evolution in cu-spinodal alloy driven by high-energy ball milling and dry sliding wear

J. Weninger, J. A. Bares, T. Tyler, J. Ye, Pascal Bellon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report on the microstructural and phase evolution of a Cu-15wt%Ni-8wt%Sn alloy that is subjected to sustained plastic deformation, either by high-energy ball milling or during dry sliding wear testing. This bronze, which is designated as C72900, can be hardened by spinodal decomposition and used in high performance bearings. Microstructural characterization of the ball milled powders and of the wear debris reveals that sustained plastic deformation, through forced mixing of the chemical species, has transformed the initial spinodal structure into an fee solid solution. Transmission electron microscopy shows also that these materials have developed small grain sizes, ranging from 20 to 200nm, with a rather pronounced texture in the ball milled powders. High resolution TEM imaging makes it possible to identify dislocations, sub-grain boundaries and nanotwins. Pin-on-disc wear tests reveal the existence of a transition from mild wear to severe wear as the load is increased. It is proposed that this transition may be affected by the microstructural changes forced in the transfer layer by sustained plastic deformation, in particular the destabilization of the initial spinodal structure.

Original languageEnglish (US)
Title of host publicationProceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
EditorsJ.M. Howe, D.E. Laughlin, J.K. Lee, U. Dahmen, W.A. Soffa
Pages887-892
Number of pages6
Volume1
StatePublished - Dec 1 2005
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 - Phoenix, AZ, United States
Duration: May 29 2005Jun 3 2005

Other

OtherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
CountryUnited States
CityPhoenix, AZ
Period5/29/056/3/05

Keywords

  • Ball milling
  • Chemical mixing
  • Sliding wear

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Weninger, J., Bares, J. A., Tyler, T., Ye, J., & Bellon, P. (2005). Microstructural evolution in cu-spinodal alloy driven by high-energy ball milling and dry sliding wear. In J. M. Howe, D. E. Laughlin, J. K. Lee, U. Dahmen, & W. A. Soffa (Eds.), Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 (Vol. 1, pp. 887-892)