About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
|
Presentation Title |
Power Ultrasound in Advanced Manufacturing |
Author(s) |
Xun Liu, Jiarui Kang, Tianzhao Wang |
On-Site Speaker (Planned) |
Xun Liu |
Abstract Scope |
Power ultrasound (UA) is known to be able to modify material behavior and properties in solid and liquid states. Acoustic softening, which describes the flow stress reduction during plastic deformation induced by UA, has been utilized in reducing forming force. In liquid metals, acoustic streaming and cavitation effects have been employed for degassing and refining microstructure. In the first part of this talk, mechanisms of acoustic softening are studied with a new micro-tensile system. In situ DIC analysis and microstructure characterizations are performed to understand the UA influence on the mechanical behavior of pure copper and transformed induced plasticity steel. The second part of the talk focuses on a hybrid ultrasonically assisted wire arc additive manufacturing process for fabricating metal matrix nanocomposites. Superimposed UA in the local deposition pool is shown to reduce porosity, refine solidification microstructure and disperse nanoparticles, which accordingly improves mechanical properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Joining, Mechanical Properties, Process Technology |