Deformation Mechanism of L1 2 ‐ γ ′ Phase in Bimodal  γ ″‐ γ ′ Precipitation Hardened Inconel 718 Superalloy | Zendy

Zhang Hongjun | Zendy; Li Chong | Zendy; Guo Qianying | Zendy; Li Huijun | Zendy; Liu Yongchang | Zendy

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Deformation Mechanism of L1 2 ‐ γ ′ Phase in Bimodal γ ″‐ γ ′ Precipitation Hardened Inconel 718 Superalloy

Author(s) -

Zhang Hongjun,

Li Chong,

Guo Qianying,

Li Huijun,

Liu Yongchang

Publication year - 2018

Publication title -

advanced engineering materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.938

H-Index - 114

eISSN - 1527-2648

pISSN - 1438-1656

DOI - 10.1002/adem.201800652

Subject(s) - materials science , inconel , superalloy , alloy , shearing (physics) , high resolution transmission electron microscopy , transmission electron microscopy , precipitation , precipitation hardening , deformation mechanism , deformation (meteorology) , metallurgy , phase (matter) , crystallography , composite material , microstructure , nanotechnology , physics , chemistry , organic chemistry , meteorology

Deformation mechanism of L1 2 ‐ γ ′ phase in bimodal γ ″‐ γ ′ precipitation hardened Inconel 718 alloy is characterized through high resolution transmission electron microscopy (HRTEM) observations. The spherical γ ′ particle exhibits morphological transition toward ellipsoid along the <110> direction and shows deformation anisotropy leading to orientation‐dependent lattice misfitting status with γ ‐matrix. The deformation process of γ ′ phase is determined to be of APB (anti‐phase boundary)‐type shearing induced by gliding of paired {100}a/2<1 ¯ 10> superpartial dislocations, thus γ ′ phase plays a APB‐strengthening role in Inconel 718 alloy.

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