About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
|
Symposium
|
5th International Congress on 3D Materials Science (3DMS 2021)
|
Presentation Title |
Thermal Expansion of Ti-7Al Using High Energy X-ray Diffraction Microscopy |
Author(s) |
Rachel Lim, Darren Pagan, Joel Bernier, Anthony Rollett |
On-Site Speaker (Planned) |
Rachel Lim |
Abstract Scope |
Hexagonal metals have anisotropic coefficients of thermal expansion, and there is little agreement in literature on the CTEs for these metals. High energy x-ray diffraction microscopy, a non-destructive, in situ, microstructural characterization technique, has been used to determine the anisotropic coefficients of thermal expansion (CTEs) for Ti-7Al. Two samples of polycrystalline Ti-7Al were continuously heated from room temperature to 850C while far-field HEDM scans were being taken. The lattice parameters at a given temperature were calculated based on the distribution of lattice parameters of the individual grains. The results showed that the CTEs in were different in the a- and c-directions respectively, and the change in the ratio of these CTEs explained the discrepancies found in literature. It was also found that the equivalent strain and von Mises stress were lower after the thermal cycle with the outliers in the initial state having shifted the most after the thermal cycle. |
Proceedings Inclusion? |
Definite: Other |