About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials
|
Presentation Title |
Enhancing the Reliability of Reconstruction for Small Grains Using Novel Laboratory Diffraction Contrast Tomography (Lab DCT) Acquisition and Reconstruction Approaches |
Author(s) |
Eshan Ganju, Eugenia Nieto-Valeiras, Javier LLorca, Nikhilesh Chawla |
On-Site Speaker (Planned) |
Eshan Ganju |
Abstract Scope |
Laboratory Diffraction Contrast Tomography (LabDCT) in tandem with Absorption Contrast Tomography (ACT) has enhanced our understanding of 3D and 4D phenomena over the last decade. One of the biggest challenges presently in Lab DCT technique is the reliable reconstruction of small grains (< 20 µm). Here we present a systematic study of different LabDCT acquisition and reconstruction strategies with the aim of improving the reliability of reconstruction of smaller grains. Two metallic samples (pure Ni and Ti) were scanned to obtain diffraction radiographs under Laue-focusing and magnified acquisition geometries. A sophisticated forward modeling-based approach was used to enhance the reconstruction reliability of the smaller grains within the samples. Furthermore, the LabDCT grain maps were compared to EBSD grain maps to assess reconstruction accuracy of the smaller grains. Finally, recommendations will be made regarding the optimal acquisition and reconstruction approaches to reliably capture small grains with the Lab DCT technique. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Copper / Nickel / Cobalt, Titanium |