Multiscale characterization of the 3D network structure of metal carbides in a Ni superalloy by synchrotron X-ray microtomography and ptychography
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
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.
Details
Original language | English |
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Pages (from-to) | 71-76 |
Number of pages | 6 |
Journal | Scripta Materialia |
Volume | 193 |
Early online date | 1 Nov 2020 |
Publication status | E-pub ahead of print - 1 Nov 2020 |
Keywords
- IN713LC Ni superalloy, Metal carbides, Ptychography, Synchrotron X-ray microtomography