About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Purveyors of Processing Science and ICME: A SMD Symposium to Honor the Many Contributions of Taylan Altan, Wei Tsu Wu, Soo-Ik Oh, and Lee Semiatin
|
Presentation Title |
Pushing the Performance Limits of Metallic Alloys through Severe Plastic Deformation Processing |
Author(s) |
Rajiv S. Mishra |
On-Site Speaker (Planned) |
Rajiv S. Mishra |
Abstract Scope |
Thermo-mechanical processing is the most common way of enhancing structural performance of metallic alloys. Friction stir processing (FSP) is a unique high temperature severe plastic deformation technique that can push the structural efficiency of an alloy. In this overview, examples of exceptional strength-ductility combination obtained using FSP will be highlighted. The examples will cover magnesium alloys, aluminum alloys, titanium alloys and steels. Hierarchical microstructure in a FSP Ti-6Al-2Sn-4Zr-6Mo alloy leads to strength of 2 GPa. FSP results in a unique modulated microstructure comprised of fine acicular α"-laths with nano precipitation within the laths. The specific strength attained in one of the conditions is close to 450 MPa m3/mg, which is about 22% to 85% greater than any commercially available metallic material. Future potential of such microstructural approach will be discussed in the context of advanced manufacturing. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |