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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

Authors

Zhiguo Zhang

Jia Chuan Khong

Billy Koe

Shifeng Luo

Shi Huang

Ling Qin

Silvia Cipiccia

Darren Batey

Andrew J. Bodey

Christoph Rau

Yu Lung Chiu

Zhu Zhang

Jean Christophe Gebelin

Nick Green



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

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