Passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming additive manufacturing

Pengfei Guo; Xin Lin; Jianrui Liu; Jianjun Xu; Jiaqiang Li; Yufeng Zhang; Xufei Lu; Ningsong Qu; Hongbo Lan; Weidong Huang

doi:10.1016/j.corsci.2020.109036

Passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming additive manufacturing

Pengfei Guo, Xin Lin, Jianrui Liu, Jianjun Xu, Jiaqiang Li, Yufeng Zhang, Xufei Lu, Ningsong Qu, Hongbo Lan, Weidong Huang

School of Materials Sience and Engineering

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

33 Scopus citations

Abstract

We report the crystallographic texture and passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming (HDR-LSF) additive manufacturing in deaerated 10 wt.% NaNO₃. The HDR-LSF Alloy 718, mainly composed of columnar grains, is detected to be weakly fiber textured due to the direction changed structure. However, passive current densities on horizontal and vertical sections have no difference and both increase linearly with the electrode potential. Furthermore, the identical steady-state passive current density on both sections is attributed to the same film/solution interface energy. Amorphous structure of the bi-layer film induces the electrochemical activity isotropy regardless of matrix texture.

Original language	English
Article number	109036
Journal	Corrosion Science
Volume	177
DOIs	https://doi.org/10.1016/j.corsci.2020.109036
State	Published - Dec 2020

Keywords

A. Superalloys
B. Polarization
B. Potentiostatic
B. XPS
C. Interfaces
C. Passive films

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10.1016/j.corsci.2020.109036

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title = "Passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming additive manufacturing",

abstract = "We report the crystallographic texture and passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming (HDR-LSF) additive manufacturing in deaerated 10 wt.% NaNO3. The HDR-LSF Alloy 718, mainly composed of columnar grains, is detected to be weakly fiber textured due to the direction changed structure. However, passive current densities on horizontal and vertical sections have no difference and both increase linearly with the electrode potential. Furthermore, the identical steady-state passive current density on both sections is attributed to the same film/solution interface energy. Amorphous structure of the bi-layer film induces the electrochemical activity isotropy regardless of matrix texture.",

keywords = "A. Superalloys, B. Polarization, B. Potentiostatic, B. XPS, C. Interfaces, C. Passive films",

author = "Pengfei Guo and Xin Lin and Jianrui Liu and Jianjun Xu and Jiaqiang Li and Yufeng Zhang and Xufei Lu and Ningsong Qu and Hongbo Lan and Weidong Huang",

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year = "2020",

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doi = "10.1016/j.corsci.2020.109036",

language = "英语",

volume = "177",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming additive manufacturing

AU - Guo, Pengfei

AU - Lin, Xin

AU - Liu, Jianrui

AU - Xu, Jianjun

AU - Li, Jiaqiang

AU - Zhang, Yufeng

AU - Lu, Xufei

AU - Qu, Ningsong

AU - Lan, Hongbo

AU - Huang, Weidong

PY - 2020/12

Y1 - 2020/12

N2 - We report the crystallographic texture and passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming (HDR-LSF) additive manufacturing in deaerated 10 wt.% NaNO3. The HDR-LSF Alloy 718, mainly composed of columnar grains, is detected to be weakly fiber textured due to the direction changed structure. However, passive current densities on horizontal and vertical sections have no difference and both increase linearly with the electrode potential. Furthermore, the identical steady-state passive current density on both sections is attributed to the same film/solution interface energy. Amorphous structure of the bi-layer film induces the electrochemical activity isotropy regardless of matrix texture.

AB - We report the crystallographic texture and passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming (HDR-LSF) additive manufacturing in deaerated 10 wt.% NaNO3. The HDR-LSF Alloy 718, mainly composed of columnar grains, is detected to be weakly fiber textured due to the direction changed structure. However, passive current densities on horizontal and vertical sections have no difference and both increase linearly with the electrode potential. Furthermore, the identical steady-state passive current density on both sections is attributed to the same film/solution interface energy. Amorphous structure of the bi-layer film induces the electrochemical activity isotropy regardless of matrix texture.

KW - A. Superalloys

KW - B. Polarization

KW - B. Potentiostatic

KW - B. XPS

KW - C. Interfaces

KW - C. Passive films

UR - http://www.scopus.com/inward/record.url?scp=85091781724&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2020.109036

DO - 10.1016/j.corsci.2020.109036

M3 - 文章

AN - SCOPUS:85091781724

SN - 0010-938X

VL - 177

JO - Corrosion Science

JF - Corrosion Science

M1 - 109036

ER -

Passive behavior of nickel-based superalloys prepared by high-deposition-rate laser solid forming additive manufacturing

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Keywords

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