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

材料学院

科研成果: 期刊稿件 › 文章 › 同行评审

5 引用（Scopus）

摘要

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.

源语言	英语
文章编号	063508
期刊	Journal of the Electrochemical Society
卷	170
期	6
DOI	https://doi.org/10.1149/1945-7111/acdafd
出版状态	已出版 - 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",

language = "英语",

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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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U2 - 10.1149/1945-7111/acdafd

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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