| Full text | |
| Author(s): |
Martinez, Fellipe
;
dos Santos Junior, Carlos
;
Leal, Jaderson
;
Silva, Argos
;
Gouveia, Guilherme
;
Spinelli, Jose
Total Authors: 6
|
| Document type: | Journal article |
| Source: | ADVANCED ENGINEERING MATERIALS; v. N/A, p. 10-pg., 2023-07-05. |
| Abstract | |
Cu-mold centrifugal cast processing is employed as a rapid solidification method for producing samples with and without Sc. The Al-Si-Mg and Al-Si-Mg-Sc alloy samples are exposed to direct aging treatments varying temperature and time to verify the microstructural changes. Both rapidly solidified samples and as-aged samples are characterized by a number of methods, including optical microscopy, SEM-EDS, transmission Electron Microscopy (TEM)-EDS, TEM-HAADF, X-ray diffraction (XRD), differential scanning calorimetry (DSC), and Vickers hardness. At first, the results point to a strong precipitate-related hardening effect formed as a result of the Sc addition to the alloy. All samples containing Sc show a higher hardness value when compared to their respective treated samples without Sc. Second, when comparing the Al-10Si-Mg-0.4Sc alloy samples among themselves after being treated at different conditions, high temperatures, and excessive treatment times are recognized as detrimental to the hardness. This is due to the growth of larger Sc-bearing precipitates of approximately 1 & mu;m in size under such conditions, having lower efficiency in pinning dislocations during loading. The best aging condition is 255 & DEG;C for 60 min, which produces a very fine dispersion of Mg and Sc intermetallics (200 nm in size) with a peak hardness of 110 HV. (AU) | |
| FAPESP's process: | 19/21937-7 - Effects of adding SC in AlSi10Mg alloy for additive manufacturing and aeronautical applications |
| Grantee: | Fellipe Martinez |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| FAPESP's process: | 21/08436-9 - Electromigration and 4D microtomography in Sn-Bi-In thermal joints |
| Grantee: | José Eduardo Spinelli |
| Support Opportunities: | Scholarships abroad - Research |
| FAPESP's process: | 19/23673-7 - Evaluation of alloys for thermal interface contact and for additive manufacturing |
| Grantee: | José Eduardo Spinelli |
| Support Opportunities: | Regular Research Grants |