About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-Grained and Heterostructured Materials (UFGH) XIV
|
| Presentation Title |
From Order to Disorder: Ball Milling Pathways for Forced Dissolution and Supersaturated Solid Solution Formation of Nanocrystalline Alloys |
| Author(s) |
Abhijeet Dhal, Prince Sharma, Ruqing Cao, Timothy J. Rupert |
| On-Site Speaker (Planned) |
Abhijeet Dhal |
| Abstract Scope |
Forced dissolution by ball milling is an efficient strategy for the creation of supersaturated nanocrystalline alloys. However, a common issue is limited co-deformation when the starting phases have disparate strengths, preventive adequate mechanochemical mixing. In this work, a novel processing route to convert fully ordered intermetallic compounds into disordered, supersaturated solid solutions is introduced, creating a pathway for ultra-high-strength nanocrystalline alloys synthesis with high dopant concentrations. Multiple Al-rich intermetallics line compounds were ball milled with refractory elements at various atomic ratios to induce disorder transitions. Effects of mechanical (lattice distortion) and chemical (atomic mixing/substitution) disordering were systematically investigated. X-ray diffraction and transmission electron microscopy characterized structural changes, while density functional theory calculations complemented experimental mechanical testing. This process is combined with grain boundary segregation engineering to create a novel Al-Ni-Mo-Y nanocrystalline alloy. This study elucidates the mechanisms of order–disorder transformation and demonstrates ball milling’s potential for advanced materials synthesis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Mechanical Properties, Powder Materials |