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

SCRIPTA MATERIALIA

卷:193

Article

Zhang, Zhiguo^1,2  Khong, Jia Chuan³  Koe, Billy^2,4  Luo, Shifeng²  Huang, Shi²  Qin, Ling²  Cipiccia, Silvia⁴  Batey, Darren⁴  Bodey, Andrew J.⁴  Rau, Christoph⁴  Chiu, Yu Lung⁵  Zhang, Zhu⁶  Gebelin, Jean-Christophe⁶  Green, Nick⁵  Mi, Jiawei² 

[1] Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China

[2] Univ Hull, Dept Engn, Kingston Upon Hull HU6 7RX, N Humberside, England

[3] UCL, Dept Med Phys Biomed Engn, London WC1E 6BT, England

[4] Diamond Light Source, Sci & Innovat Campus, Harwell OX11 0DE, Berks, England

[5] Univ Birmingham, Sch Met & Mat, High Temp Res Ctr, Birmingham B15 2TT, W Midlands, England

[6] Doncasters Grp Tech Ctr, George Baylis Rd, Droitwich WR9 9RB, England

关键词: Synchrotron X-ray microtomography;    Ptychography;    Metal carbides;    IN713LC Ni superalloy;   

DOI  :  10.1016/j.scriptamat.2020.10.032

来源: Elsevier

【 摘 要 】

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 gamma and gamma' 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 similar to 30 nm. (c) 2020 Acta Materialia Inc. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)

【 授权许可】

Free