Multiscale characterization of the 3D network structure of metal carbides in a Ni superalloy by synchrotron X-ray microtomography and ptychography. (1st March 2021)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Scripta materialia. Number 193(2021)
• Page Start: 71
• Page End: 76
• Publication Date: 2021-03-01
• Subjects: Synchrotron X-ray microtomography -- Ptychography -- Metal carbides -- IN713LC Ni superalloy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.10.032
• Languages: English
• ISSNs: 1359-6462

Abstract

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. Graphical abstract: Image, graphical abstract