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Kotadia, HR, Qian, M, Eskin, DG and Das, A (2017) On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification. Materials & Design, 132. pp. 266-274. ISSN 0264-1275
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On the microstructural refinement in commercial purity Al and Al10wt Cu alloy under ultrasonication during solidification.pdf - Accepted Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (766kB) | Preview |
Abstract
Physical grain refinement is examined under high-intensity ultrasonication during solidification in commercial purity Al (CP-Al) and binary Al-10 wt% Cu alloy melts cooled naturally in air and compared against chemical inoculation using Al-5Ti-1B grain refiner. The coarse dendritic unrefined base microstructure was completely replaced with a fine equiaxed grain structure in the case of either inoculation or ultrasonication. However, ultrasonication produced more effective refinement over chemical inoculation with a two-fold and eight-fold increase in the grain density in CP-Al and Al-10%Cu alloy, respectively. While combining chemical inoculation with ultrasonication produced the finest grain structure in CP-Al, no further improvement over ultrasonication was noted for the Al-10%Cu alloy. Noticeable reduction in nucleation undercooling, of similar magnitude to chemical inoculation, was observed under ultrasonication. Cooling curve observations indicate strongly enhanced heterogeneous nucleation under ultrasonication. It appears that although chemical inoculation utilises higher potency nucleants, more nucleation events are favoured under cavitation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 0910 Manufacturing Engineering; 0912 Materials Engineering; 0913 Mechanical Engineering; Materials |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Engineering |
| Publisher: | Elsevier BV |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 27 Jan 2025 12:22 |
| Last Modified: | 27 Jan 2025 12:30 |
| DOI or ID number: | 10.1016/j.matdes.2017.06.065 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/25442 |
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