{"title":"Characterization of M23C6 carbide precipitated at grain boundaries in a superalloy","authors":"Rong Yong-Hua, Guo Yong-Xiang, Hu Geng Xiang","doi":"10.1016/0026-0800(89)90021-9","DOIUrl":null,"url":null,"abstract":"<div><p>Transmission electron microscopy studies were undertaken to characterize the formation, the imperfection, and the interfacial structure of grain boundary M<sub>23</sub>C<sub>6</sub> carbide in a Ni-base superalloy. The carbides are nucleated separately on both sides of the grain boundary. Each carbide particle possesses a coherent boundary on its matrix side and a high-angle boundary on the other side. The particle is composed of several subgrains, and antiphase boundaries are observed between the subgrain. Lattice defects, such as dislocations, stacking faults, and microtwins, are revealed in the M<sub>23</sub>C<sub>6</sub> carbides.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 47-55"},"PeriodicalIF":0.0000,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90021-9","citationCount":"39","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metallography","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0026080089900219","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 39
Abstract
Transmission electron microscopy studies were undertaken to characterize the formation, the imperfection, and the interfacial structure of grain boundary M23C6 carbide in a Ni-base superalloy. The carbides are nucleated separately on both sides of the grain boundary. Each carbide particle possesses a coherent boundary on its matrix side and a high-angle boundary on the other side. The particle is composed of several subgrains, and antiphase boundaries are observed between the subgrain. Lattice defects, such as dislocations, stacking faults, and microtwins, are revealed in the M23C6 carbides.
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