|
Isothermal aging of Al-Ni-Sc alloy containing Al3Ni microfibers and Al3Sc nanoprecipitates |
|---|---|
| รหัสดีโอไอ | |
| Creator | Chanun SUWANPREECHA |
| Title | Isothermal aging of Al-Ni-Sc alloy containing Al3Ni microfibers and Al3Sc nanoprecipitates |
| Contributor | Jacques Perrin TOININ, Phromphong PANDEE, David C. DUNAND, Chaowalit LIMMANEEVICHITR |
| Publisher | Metallurgy and Materials Science Research Institute Chulalongkorn University |
| Publication Year | 2562 |
| Journal Title | Journal of Metals Materials and Minerals |
| Journal Vol. | 29 |
| Journal No. | 2 |
| Page no. | 37-41 |
| Keyword | Al-Ni-Sc alloy, Atom probe tomography, Precipitation strengthening |
| URL Website | http://ojs.materialsconnex.com/index.php/jmmm/article/view/477 |
| Website title | Isothermal aging of Al-Ni-Sc alloy containing Al 3 Ni microfibers and Al 3 Sc nanoprecipitates | Suwanpreecha | Journal of Metals Materials and Minerals |
| ISSN | 8576149 |
| Abstract | Binary Al-Sc alloys have excellent strength at room and elevated temperature up to 300?C due to coherent of Al3Sc nanoprecipitates. Binary Al-Ni alloys are an alternative alloy for high-temperature applications owing to high-thermal stability of Al3Ni microfibers. In this study, the hardness evolution at 300?C for up to 672 h for eutectic ternary Al-6Ni-0.4Sc (wt%) was studied and compared with binary Al-0.4Sc and Al-6Ni alloys. The Al-6Ni alloy maintains a constant hardness after aging at 300?C up to 672 h. Both Al-0.4Sc and Al-6Ni-0.4Sc alloys show strong precipitation strengthening response, with peak hardness reached after about 3 h aging, due to Al3Sc precipitates. These precipitates were studied in Al-6Ni-0.4Sc via local electrode atom probe tomography and contain small amounts of Ni (0.04 at%) which do not affect the kinetics of precipitation. The microhardness evolution for Al-6Ni-0.4Sc can be explained through superposition of binary Al-0.4Sc and Al-6Ni alloys, indicating that both Al3Sc nanoprecipitates and Al3Ni microfibers contribute to strength |
