{"title":"Influence of alloying element Nb on the γ′ phase structure and mechanical properties of Co–8.8Al–9.8W alloy","authors":"Wenjie Geng, Tongchao Wang, Yangtao Xu","doi":"10.1007/s12034-024-03297-y","DOIUrl":null,"url":null,"abstract":"<div><p>Effect of Nb element on the microstructure and mechanical properties of Co–8.8Al–9.8W superalloy was analysed by studying the occupancy of Nb element in the lattice and difference in the microstructure evolution during deformation. The calculation results show that Nb atom occupies the first priority position of Al<sub>2</sub> and the second priority position of W<sub>6</sub>, forming a γ′ phase doped structure, and its strength, hardness and structural stability are improved. In the process of high-temperature deformation, the dislocations of 0Nb alloy have the mechanisms of cutting and bypassing, which makes strengthening phase rafting phenomenon, and dislocation propagation in 2Nb alloy is difficult, and there are a lot of stacking faults. Compared to 0Nb alloy, 2Nb alloy has improved nano-indentation hardness and elasticity modulus.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"47 4","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12034-024-03297-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Effect of Nb element on the microstructure and mechanical properties of Co–8.8Al–9.8W superalloy was analysed by studying the occupancy of Nb element in the lattice and difference in the microstructure evolution during deformation. The calculation results show that Nb atom occupies the first priority position of Al2 and the second priority position of W6, forming a γ′ phase doped structure, and its strength, hardness and structural stability are improved. In the process of high-temperature deformation, the dislocations of 0Nb alloy have the mechanisms of cutting and bypassing, which makes strengthening phase rafting phenomenon, and dislocation propagation in 2Nb alloy is difficult, and there are a lot of stacking faults. Compared to 0Nb alloy, 2Nb alloy has improved nano-indentation hardness and elasticity modulus.
期刊介绍：
The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.
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