Electrochemical dissolution behavior of heat treated laser solid formed Inconel718

被引：28

作者：

Zhang, Yufeng ^{[1
,2
]}

Lin, Xin ^{[1
,2
]}

Yu, Jun ^{[1
,2
]}

Guo, Pengfei ^{[3
]}

Li, Jiaqiang ^{[1
,2
]}

Qin, Tuo ^{[1
,2
]}

Liu, Jianrui ^{[1
,2
]}

Huang, Weidong ^{[1
,2
]}

机构：

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

[2] Northwestern Polytech Univ, MIIT China, Key Lab Met High Performance Addit Mfg & Innovat, Xian 710072, Peoples R China

[3] Qingdao Univ Technol, Shandong Engn Res Ctr Addit Mfg, Qingdao 266520, Peoples R China

来源：

CORROSION SCIENCE | 2020年 / 173卷

基金：

中国国家自然科学基金;

关键词：

Superalloys; Polarization; SEM; Anodic dissolution; Additive manufacturing (AM); Laser solid forming (LSF); CRYSTALLOGRAPHIC ORIENTATION; TEXTURE DEVELOPMENT; SURFACE INTEGRITY; CORROSION; MICROSTRUCTURE; NICKEL; FILM; PHASES; COBALT; SPEED;

D O I：

10.1016/j.corsci.2020.108750

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure characteristic and its effects on electrochemical dissolution behavior of horizontal plane (HP) and vertical plane (VP) in the laser solid formed (LSF) Inconel718 alloy after double aging (DA) heat treatment (DA-LSF Inconel718) were investigated. Compared to the as-deposited one, DA-LSF Inconel718 shows more phases and presents electrochemical anisotropy between HP and VP including the polarization curves, current efficiency curves and surface roughness. It is caused by different electrochemical dissolution processes on HP and VP and proved that surface energy has no obvious effect. Three models were proposed to illustrate electrochemical dissolution behavior, surface formation mechanism and electrochemical anisotropy, respectively.

引用

页数：13

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