Multiscale characterization of the 3D network structure of metal carbides in a Ni superalloy by synchrotron X-ray microtomography and ptychography

Zhang, Zhiguo; Khong, Jia Chuan; Koe, Billy; Luo, Shifeng; Huang, Shi; Qin, Ling; Cipiccia, Silvia; Batey, Darren; Bodey, Andrew J.; Rau, Christoph; Chiu, Yu Lung; Zhang, Zhu; Gebelin, Jean Christophe; Green, Nick; Mi, Jiawei

Abstract

Synchrotron X-ray microtomography and ptychography were used to characterize the 3D network structure, morphology and distribution of metal carbides in an as-cast IN713LC Ni superalloy. MC typed carbides were found to distribute mainly on the grain boundary between the matrix γ and γ' phase. The differences in solidification cooling rate had a minor influence on the volume fraction of the MC type carbides, but significantly affected the carbide size, distribution and network morphology. Depending on the local composition of the remaining liquid phase and geometric constraints, the carbides can form either spherical or strip or network morphologies. The research demonstrated clearly the advantage and technical potential of using the two complementary tomography techniques synergistically to characterize non-destructively complex multiple-phase structures in three dimensional space with a spatial resolution of ~30 nm.

Citation

Zhang, Z., Khong, J. C., Koe, B., Luo, S., Huang, S., Qin, L., …Mi, J. (2021). Multiscale characterization of the 3D network structure of metal carbides in a Ni superalloy by synchrotron X-ray microtomography and ptychography. Scripta materialia, 193, 71-76. https://doi.org/10.1016/j.scriptamat.2020.10.032

• Journal Article Type: Article
• Acceptance Date: Oct 16, 2020
• Online Publication Date: Nov 1, 2020
• Publication Date: 2021-03
• Deposit Date: Apr 11, 2022
• Publicly Available Date: Apr 11, 2022
• Journal: Scripta Materialia
• Print ISSN: 1359-6462
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 193
• Pages: 71-76
• DOI: https://doi.org/10.1016/j.scriptamat.2020.10.032
• Keywords: Synchrotron X-ray microtomography; Ptychography; Metal carbides; IN713LC Ni superalloy
• Public URL: https://hull-repository.worktribe.com/output/3651257