About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Ultrafine-grained and Heterostructured Materials (UFGH XI)
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Presentation Title |
Microscructure Evolution in CuZr Alloy and cp Ti Processed by a Novel Technique of Rotational Free Bending |
Author(s) |
Tomáš Krajnák, Miloš Janeček, Petr Harcuba, Peter Minárik, Cinthia Antunes Corręa, Jakub Čížek, Arsenyi G. Raab, Georgy I. Raab |
On-Site Speaker (Planned) |
Tomáš Krajnák |
Abstract Scope |
A novel technique referred to as rotational free bending was employed to produce gradient fine grained microsctructures in CuZr alloy and commercial pure (cp) titanium. A newly designed die allowing a continuos and repetitive movement of a workpiece through a set of rollers in a channel bent by 90 degrees was employed to produce a series of billets after different number of passes. Microstructure evolution along the cross section of individual billets in both materials was observed by light microscopy and microhardess measurement. The formation of the heterogeneous fine grained structure in the material during one pass was consistent with theoretical modelling of strain distribution by FEM. EBSD analysis from the selected arreas revealed the continuous microstructure fragmentation with increasing number of passes. The variations in dislocation density with strain imposed to the material by free bending was characterized in detail by positron annihilation spectroscopy and complemented by X-ray diffraction. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |