| タイトル | Effects of a Tantalum Addition on the Morphological and Compositional Evolutions of a Model Ni-AL-Cr Superalloy |
| 著者（英） | Noebe, Ronald D.; Booth-Morrison, Christopher; Seidman, David N. |
| 著者所属（英） | Northwestern Univ. |
| 発行日 | 2008-09-14 |
| 言語 | eng |
| 内容記述 | The effects of a 2.0 at.% addition of Ta to a model Ni-Al-Cr superalloy aged at 1073 K are assessed using scanning electron microscopy and atom-probe tomography. The addition of Ta results in appreciable strengthening, and the morphology is found to evolve from a bimodal distribution of spheroidal precipitates, to cuboidal precipitates aligned along the elastically soft <001>-type directions. Tantalum is observed to partition preferentially to the gamma -precipitate phase and decreases the mobility of Ni in the gamma- matrix sufficiently to cause an accumulation of Ni on the gamma-matrix side of the gamma -precipitate/gamma-matrix heterophase interface. |
| NASA分類 | Metals and Metallic Materials |
| レポートNO | E-16901 |
| 権利 | Copyright |
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