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

被引：9

作者：

Guo, Pengfei ^{[1
,2
]}

Lin, Xin ^{[3
]}

Macdonald, Digby D. ^{[4
]}

Odnevall, Inger ^{[5
]}

Zhang, Shaoli ^{[6
]}

Zhang, Yufeng ^{[3
]}

Lin, Changjian ^{[1
]}

Wu, Qiang ^{[2
]}

Yang, Yuan ^{[2
]}

Huang, Weidong ^{[3
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[2] Suzhou Electromaching Machine Tool Res Inst Co Ltd, Suzhou 215011, Jiangsu, Peoples R China

[3] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

[4] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA

[5] KTH Royal Inst Technol, Sch Engn Sci Chem Biotechol & Hlth, Dept Chem, Div Surface & Corros Sci, SE-10044 Stockholm, Sweden

[6] Xian Inst Electromech Informat Technol, Xian 710065, Peoples R China

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2023年 / 170卷 / 06期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

INCONEL; 718; BEHAVIOR; MICROSTRUCTURE; DISSOLUTION; DEPOSITION; SPEED; ALLOY; NACL;

D O I：

10.1149/1945-7111/acdafd

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

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.

引用

页数：9

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