Effect of Al addition on intergranular embrittlement behavior of GH3535 alloy induced by fission product Te. (October 2022)

• Record Type: Journal Article
• Authors: Wang, J.M.; Jia, Y.Y.; Han, F.F.; Lu, Y.L.; Zhu, Z.Y.; Ye, X.X.; Wang, W.X.; Wang, S.L.; Zhou, X.T.
• Is Part Of: Corrosion science. Volume 207(2022)
• Publication Date: 2022-10
• Subjects: GH3535 alloy -- Aluminum modified -- Intergranular embrittlement -- Tensile property; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110576
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: The effect of Al addition on Te diffusion behavior of a Ni-16Mo-7Cr base superalloy was investigated at 800 °C for 100 h. The results show that Ni3 Te2 and Cr3 Te4 are the mainly reaction products formed on the surface of Al-modified alloy. Although no aluminum telluride is detected both on the surface and in the alloy, the addition of Al promotes the formation of compact and continuous Cr3 Te4 layer on the surface, which effectively inhibits the diffusion of Te into the alloy. Moreover, Al can also promote the γ' phase formation, and thus improve the tensile property of the alloy significantly. Highlights: Effect of Al on intergranular embrittlement behavior of GH3535 alloy in Te vapor was investigated. Al addition can significantly decrease the diffusion depth of Te into the alloy. Al addition can promote the formation of Cr3 Te4 in the reaction layer. The optimum content of Al should be 1 % in the alloy.