Effects of microstructures on the sliding behavior of hot-pressed CoCrMo alloys
| Autor: | Akihiko Chiba, Ning Tang, Yunping Li, Kenta Yamanaka, Shingo Kurosu, Yan Chen |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Annealing (metallurgy) Metallurgy Alloy Abrasive Precipitate morphology Surfaces and Interfaces engineering.material Condensed Matter Physics Microstructure Surfaces Coatings and Films Mechanics of Materials Materials Chemistry Hardening (metallurgy) engineering Lamellar structure Sliding wear |
| Zdroj: | Wear. 319:200-210 |
| ISSN: | 0043-1648 |
| DOI: | 10.1016/j.wear.2014.07.022 |
| Popis: | Cobalt–chromium–molybdenum (CoCrMo) alloys are widely applied as wear-resistant material. This article aims to illustrate the influence of phase constitution and precipitate morphology on the wear behavior of hot-pressed high carbon alloys. Wear behavior of two kinds of CoCrMo alloys, HP (hot-pressed) and HPA (hot-pressed+annealing) with various microstructure, hardness and surface topography were evaluated in detail. The e phase dominant HP alloy with homogenous lamellar precipitates demonstrates higher hardness, consequently lower coefficient of friction and prominent wear resistance with mild sliding wear. In contrary, the γ phase dominant HPA alloy with carbide-free grains was characterized by abrasive wear of micro grooves. The matrix hardness strengthened by e phase is more significant to affect wear behavior than precipitate hardening. Homogenous lamellar precipitates have a stand-out effect to block abrasion and accumulate tribochemical products. |
| Databáze: | OpenAIRE |
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