Segregation of alloying elements at planar faults during creep in the PM Ni-based superalloy FGH4096

H.P Zhang,J.M Bai,X.Y Li,X.K Li,J Jia,J.T Liu,Y.W Zhang

doi:10.1016/j.matlet.2023.134741

Segregation of alloying elements at planar faults during creep in the PM Ni-based superalloy FGH4096

H.P Zhang, J.M Bai + Show 5 more

https://doi.org/10.1016/j.matlet.2023.134741

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Journal: Materials Letters

Publication Date: Jun 15, 2023

Affiliation: Aero Engine Corporation of China (China), China Iron and Steel Research Institute Group, Northeastern University

#Powder Metallurgy Ni-based Superalloy #Planar Faults + Show 8 more

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Abstract

In this work, the segregation of alloying elements at planar faults during creep in the powder metallurgy (PM) Ni-based superalloy FGH4096 was characterized. It was found that Co, Cr, Mo, Ti, and Nb segregated to the superlattice extrinsic stacking fault and microtwin boundaries in the γ′ phase during creep, leading to the disordered local phase transformation in the γ′ phase. This element segregation behavior of FGH4096 was different from other superalloys which had been reported. This study contributed to understanding the interaction between alloying elements and planar faults in FGH4096 during creep.

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