Samuel, Ehab, Samuel, Agnes M., Songmene, Victor, Doty, Herbert W. et Samuel, Fawzy H..
2024.
« Analysis of Ni-Cu interaction in aluminum-based alloys: Hardness, tensile and precipitation behavior ».
Materials, vol. 17, nº 18.
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Résumé
The present work was aimed at quantifying the effects of Ni addition in the range of 0–4% together with 0.3%Zr on the hardness and the tensile properties, volume fraction of intermetallics, and changes in size and distribution of phase precipitation in Sr-modified Al-9%Si-2%Cu-0.6%Mg cast alloys. The study was mainly carried out using high-resolution FESEM and TEM microscopes equipped with EDS facilities. Samples were solidified at the rate of ~3 ◦C/s and examined at different aging conditions. The investigations are supported by thermal analysis carried out at a solidification rate of ~0.8 ◦C/s. The results revealed that the main compositions of the Ni-based phases are close to Al3(Ni,Cu), Al3CuNi, and Al3Ni. An Al3Ni2Cu2 phase was also detected in the 4%Ni alloy. The Cu–Ni phases were observed to precipitate, covering the surfaces of pre-existing primary Al3Zr particles. The TEM analysis indicated the magnitude of the reduction in both size and density of the precipitated Al2Cu phase particles as the Ni content reached 4%, coupled with a delay in the transition from coherent to incoherency of the Al2Cu precipitates.
| Type de document: | Article publié dans une revue, révisé par les pairs |
|---|---|
| Professeur: | Professeur Songmene, Victor |
| Affiliation: | Génie mécanique |
| Date de dépôt: | 25 oct. 2024 15:34 |
| Dernière modification: | 28 oct. 2024 16:48 |
| URI: | https://espace2.etsmtl.ca/id/eprint/29751 |
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