Chloride Induced Secondary Passive Film Failure for Laser Additive Manufacturing Nickel-Based Superalloys during Electrochemical Machining

Pengfei Guo; Xin Lin; Digby D. Macdonald; Inger Odnevall; Shaoli Zhang; Yufeng Zhang; Changjian Lin; Qiang Wu; Yuan Yang; Weidong Huang

doi:10.1149/1945-7111/acdafd

Chloride Induced Secondary Passive Film Failure for Laser Additive Manufacturing Nickel-Based Superalloys during Electrochemical Machining

Pengfei Guo, Xin Lin, Digby D. Macdonald, Inger Odnevall, Shaoli Zhang, Yufeng Zhang, Changjian Lin, Qiang Wu, Yuan Yang, Weidong Huang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We investigated the influence of chloride on the secondary passive film (SPF) on laser directed energy deposition Alloy 718 during electrochemical machining. The results show that SPF formed in chloride-containing electrolyte is more defective than that formed in chloride-free solution, due to the stepped-up cation ejection by chloride. Chloride accelerates the SPF failure via enhanced cation vacancy condensation, SPF dissolution and possibly via surface vacancy pairs' coalescence, restraining the formation of CrO3 and inducing a better surface quality than does the chloride-free electrolyte. Based on the Point Defect Model, a mechanism describing the influence of chloride on SPF was developed.

Original language	English
Article number	063508
Journal	Journal of the Electrochemical Society
Volume	170
Issue number	6
DOIs	https://doi.org/10.1149/1945-7111/acdafd
State	Published - 2023

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title = "Chloride Induced Secondary Passive Film Failure for Laser Additive Manufacturing Nickel-Based Superalloys during Electrochemical Machining",

abstract = "We investigated the influence of chloride on the secondary passive film (SPF) on laser directed energy deposition Alloy 718 during electrochemical machining. The results show that SPF formed in chloride-containing electrolyte is more defective than that formed in chloride-free solution, due to the stepped-up cation ejection by chloride. Chloride accelerates the SPF failure via enhanced cation vacancy condensation, SPF dissolution and possibly via surface vacancy pairs' coalescence, restraining the formation of CrO3 and inducing a better surface quality than does the chloride-free electrolyte. Based on the Point Defect Model, a mechanism describing the influence of chloride on SPF was developed.",

author = "Pengfei Guo and Xin Lin and Macdonald, {Digby D.} and Inger Odnevall and Shaoli Zhang and Yufeng Zhang and Changjian Lin and Qiang Wu and Yuan Yang and Weidong Huang",

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year = "2023",

doi = "10.1149/1945-7111/acdafd",

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T1 - Chloride Induced Secondary Passive Film Failure for Laser Additive Manufacturing Nickel-Based Superalloys during Electrochemical Machining

AU - Guo, Pengfei

AU - Lin, Xin

AU - Macdonald, Digby D.

AU - Odnevall, Inger

AU - Zhang, Shaoli

AU - Zhang, Yufeng

AU - Lin, Changjian

AU - Wu, Qiang

AU - Yang, Yuan

AU - Huang, Weidong

PY - 2023

Y1 - 2023

N2 - We investigated the influence of chloride on the secondary passive film (SPF) on laser directed energy deposition Alloy 718 during electrochemical machining. The results show that SPF formed in chloride-containing electrolyte is more defective than that formed in chloride-free solution, due to the stepped-up cation ejection by chloride. Chloride accelerates the SPF failure via enhanced cation vacancy condensation, SPF dissolution and possibly via surface vacancy pairs' coalescence, restraining the formation of CrO3 and inducing a better surface quality than does the chloride-free electrolyte. Based on the Point Defect Model, a mechanism describing the influence of chloride on SPF was developed.

AB - We investigated the influence of chloride on the secondary passive film (SPF) on laser directed energy deposition Alloy 718 during electrochemical machining. The results show that SPF formed in chloride-containing electrolyte is more defective than that formed in chloride-free solution, due to the stepped-up cation ejection by chloride. Chloride accelerates the SPF failure via enhanced cation vacancy condensation, SPF dissolution and possibly via surface vacancy pairs' coalescence, restraining the formation of CrO3 and inducing a better surface quality than does the chloride-free electrolyte. Based on the Point Defect Model, a mechanism describing the influence of chloride on SPF was developed.

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DO - 10.1149/1945-7111/acdafd

M3 - 文章

AN - SCOPUS:85163611591

SN - 0013-4651

VL - 170

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

IS - 6

M1 - 063508

ER -

Chloride Induced Secondary Passive Film Failure for Laser Additive Manufacturing Nickel-Based Superalloys during Electrochemical Machining

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