About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Tribology: Advances in Friction, Wear and Lubrication of Interfaces
|
| Presentation Title |
Effect of dilution on the wear resistance of Co-Cr wear resistant overlay alloys |
| Author(s) |
Ram Krishnamurthy, Paul Crook |
| On-Site Speaker (Planned) |
Ram Krishnamurthy |
| Abstract Scope |
Dilution of the overlay alloy due to mixing with the base metal during welding alters its chemical composition and affects its wear/corrosion properties. We examine the effects of varying the thickness of the overlay and the base (Fe- or Ni-) of the substrate alloy on the wear resistance of two different Co-based weld overlay alloys, Stellite®6 and ULTIMET®. Results from self-mated pin-on-disk (POD) tests (ASTM G99 standard) run with 316L stainless steel pins/disks overlaid with these alloys with or without a sandwich Ni-82 filler metal layer are reported. The crucial effect of carbon content of the overlay alloy and the greater adverse impact of dilution due to Ni- compared to that due to Fe on the wear resistance of the overlay alloys are demonstrated. SEM metallography / EDS analysis is used to illuminate the impact of dilution on the dominant wear mechanisms in these alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Copper / Nickel / Cobalt, Other |