Elemental preference and atomic scale site recognition in a Co-Al-W-base superalloy. Issue 1 (December 2017)

• Record Type: Journal Article
• Authors: Chen, Yanhui; Xue, Fei; Mao, Shengcheng; Long, Haibo; Zhang, Bin; Deng, Qingsong; Chen, Bin; Liu, Yinong; Maguire, Pierce; Zhang, Hongzhou; Han, Xiaodong; Feng, Qiang
• Is Part Of: Scientific reports. Volume 7:Issue 1(2017)
• Page Start: 1
• Page End: 6
• Publication Date: 2017-12
• Subjects: Natural history -- Research -- Periodicals; Biology -- Research -- Periodicals; Physical sciences -- Research -- Periodicals; Earth sciences -- Research -- Periodicals; Environmental sciences -- Research -- Periodicals; 502.85
• DOI: 10.1038/s41598-017-17456-1
• Languages: English
• ISSNs: 2045-2322

Abstract

Abstract Using state-of-the-art atomic scale super energy dispersive X-ray spectroscopy and high angle annular dark field imaging this study reveals the elemental partitioning preference between the γ′ and γ phases in a Co-Al-W-Ti-Ta superalloy and the site preference of its alloying elements in the ordered L12 γ′ phase. A semi-quantitative analysis of atomic column compositions in the ordered L12 γ′ structure is provided. Co atoms were found to occupy the {1/2, 1/2, 0} face-center positions whereas Al, W, Ti and Ta atoms prefer to occupy the {0, 0, 0} cube corner positions in the L12 γ phase. These findings agree well with predictions from first principles simulations in the literature.