Characterization of Ion Implanted and Laser Processed Wear Surfaces.
Abstract
SEM/EDX (Scanning Electron Microscopy/Energy Dispersing X Ray Analysis) and scanning Auger microscope analysis were employed to characterize wear surfaces and debris on friction tested, laser processed metal-carbide composite surfaces. The friction and wear of the composite samples were found to be influenced by the compatibility (degree of mutual solubility) of the carbides with the steel counterface, as well as by local inhomogeneities in the carbide distribution. High fluence Ti implantation resulted in increased friction and wear, possibly due to an implantation induced softening or degradation of the carbides. Cavitation erosion tests were performed on nonimplanted and ion implanted samples of a Co based hardface alloy (Stoody 3). Erosion of the test samples was found to initiate by debonding at the carbide-matrix interfaces and by crack propagation through the carbides. The erosion mechanisms in the alloy were altered by both N and Ti implantations. Ti implantation, in particular, appeared to significantly increase the erosion resistance of the alloy. TEM (Transmission Electron Microscopy) studies were made on nonimplanted and ion implanted foils of Stoody 3, to investigate structural changes induced by implantation. Ti implantation produced a surface layer with an amorphous matrix phase and recrystallized carbides, while N implantation greatly increased the stacking fault density in the matrix phase.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 22, 1986
- Accession Number
- ADA167878
Entities
People
- Sara A. Dillich
Organizations
- Worcester Polytechnic Institute