The effects of ruthenium on the phase stability of fourth generation Ni-base single crystal superalloys
| Autor: | Takao Murakumo, Atsushi Sato, Yutaka Koizumi, Hiroshi Harada, Hachiro Imai, Tadaharu Yokokawa, Toshiharu Kobayashi |
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| Rok vydání: | 2006 |
| Předmět: |
Materials science
Precipitation (chemistry) Scanning electron microscope Mechanical Engineering Metallurgy Metals and Alloys Condensed Matter Physics Microstructure Superalloy Transition metal Chemical engineering Mechanics of Materials Transmission electron microscopy Phase (matter) General Materials Science Single crystal |
| Zdroj: | Scripta Materialia. 54:1679-1684 |
| ISSN: | 1359-6462 |
| Popis: | The formation of topologically close-packed (TCP) phases in nickel-base single crystal superalloys causes considerable degradation of the mechanical properties. It has recently been found that platinum-group metals can be effective in controlling the precipitation of such phases, and this extent of precipitation control requires further investigation. This study compares Ru-containing and non-Ru-containing single crystal superalloys. Scanning electron microscopy microstructural observations showed that the rate of TCP phase precipitations decreased through Ru addition. Transmission electron microscopy microstructural observations showed that the P phase, one of the TCP phases, was eliminated through the addition of Ru. The occurrence of this phenomenon will be discussed. |
| Databáze: | OpenAIRE |
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