About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Alloys: Development and Manufacturing
|
| Presentation Title |
Improvement in the uniformity of bismuth
distribution in an Al-Bi alloy by ultrasonic processing and hydrogen melt enrichment
|
| Author(s) |
Suwaree Chankitmunkong, Dmitry Eskin, Onnjira Diewwanit |
| On-Site Speaker (Planned) |
Suwaree Chankitmunkong |
| Abstract Scope |
Manufacturing of immiscible metallic alloys, such as aluminum-bismuth, faces challenges in achieving uniform distribution of secondary phase droplets/particles due to their higher density and tendency to agglomerate/coalesce, which negatively affects mechanical properties. Recent studies on emulsification of water-oil mixtures showed that ultrasonic treatment (UST) of gas-saturated systems improved the droplet distribution. In this work we tested this approach on Al-Bi alloys with melt saturated with hydrogen. It was demonstrated that this combination resulted in the uniform distribution of fine Bi droplets in aluminum matrix. The enhanced wear resistance could be attributed to the small and uniformly distributed Bi. UST has a dual role in the process: (a) increased cavitation facilitated by dissolved hydrogen improves the efficiency of droplet formation and distribution and (b) ultrasonic degassing eliminates the adverse effects of gas porosity. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Other, Other |