Pitting corrosion of SLM Inconel 718 sample under surface and heat treatments

Baicheng Zhang; Mingzhen Xiu; Yong Teck Tan; Jun Wei; Pei Wang

doi:10.1016/j.apsusc.2019.06.043

Pitting corrosion of SLM Inconel 718 sample under surface and heat treatments

Baicheng Zhang^*
, Mingzhen Xiu
, Yong Teck Tan
, Jun Wei
, Pei Wang

^*Corresponding author for this work

University of Science and Technology Beijing
Nanyang Technological University
Agency for Science, Technology and Research, Singapore

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

85 Scopus citations

Abstract

In this study, the corrosion behavior of SLM Inconel 718 samples was investigated under different post-treatments including various heat treatments and surface electrochemical polishing. From the test results, the new generation of precipitation of γ′/γ″ phase from the samples after HT 1040 and HT1100 can lead to a corrosion resistance improvement. A serious corrosion resistance performance decline can be found from the sample after HT1200 due to grain growth and large amount of Cr element transformation to carbide. A dense passivation coating over sample surface generated from ECP process can significantly increase both corrosion potential and pitting potential.

Original language	English
Pages (from-to)	556-567
Number of pages	12
Journal	Applied Surface Science
Volume	490
DOIs	https://doi.org/10.1016/j.apsusc.2019.06.043
State	Published - 1 Oct 2019
Externally published	Yes

Keywords

Electrochemical polishing (ECP)
Heat treatment
Inconel alloy
Pitting corrosion
Selective laser melting (SLM)

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10.1016/j.apsusc.2019.06.043

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title = "Pitting corrosion of SLM Inconel 718 sample under surface and heat treatments",

abstract = "In this study, the corrosion behavior of SLM Inconel 718 samples was investigated under different post-treatments including various heat treatments and surface electrochemical polishing. From the test results, the new generation of precipitation of γ′/γ″ phase from the samples after HT 1040 and HT1100 can lead to a corrosion resistance improvement. A serious corrosion resistance performance decline can be found from the sample after HT1200 due to grain growth and large amount of Cr element transformation to carbide. A dense passivation coating over sample surface generated from ECP process can significantly increase both corrosion potential and pitting potential.",

keywords = "Electrochemical polishing (ECP), Heat treatment, Inconel alloy, Pitting corrosion, Selective laser melting (SLM)",

author = "Baicheng Zhang and Mingzhen Xiu and Tan, \{Yong Teck\} and Jun Wei and Pei Wang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

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day = "1",

doi = "10.1016/j.apsusc.2019.06.043",

language = "英语",

volume = "490",

pages = "556--567",

journal = "Applied Surface Science",

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TY - JOUR

T1 - Pitting corrosion of SLM Inconel 718 sample under surface and heat treatments

AU - Zhang, Baicheng

AU - Xiu, Mingzhen

AU - Tan, Yong Teck

AU - Wei, Jun

AU - Wang, Pei

PY - 2019/10/1

Y1 - 2019/10/1

N2 - In this study, the corrosion behavior of SLM Inconel 718 samples was investigated under different post-treatments including various heat treatments and surface electrochemical polishing. From the test results, the new generation of precipitation of γ′/γ″ phase from the samples after HT 1040 and HT1100 can lead to a corrosion resistance improvement. A serious corrosion resistance performance decline can be found from the sample after HT1200 due to grain growth and large amount of Cr element transformation to carbide. A dense passivation coating over sample surface generated from ECP process can significantly increase both corrosion potential and pitting potential.

AB - In this study, the corrosion behavior of SLM Inconel 718 samples was investigated under different post-treatments including various heat treatments and surface electrochemical polishing. From the test results, the new generation of precipitation of γ′/γ″ phase from the samples after HT 1040 and HT1100 can lead to a corrosion resistance improvement. A serious corrosion resistance performance decline can be found from the sample after HT1200 due to grain growth and large amount of Cr element transformation to carbide. A dense passivation coating over sample surface generated from ECP process can significantly increase both corrosion potential and pitting potential.

KW - Electrochemical polishing (ECP)

KW - Heat treatment

KW - Inconel alloy

KW - Pitting corrosion

KW - Selective laser melting (SLM)

UR - https://www.scopus.com/pages/publications/85067822906

U2 - 10.1016/j.apsusc.2019.06.043

DO - 10.1016/j.apsusc.2019.06.043

M3 - 文章

AN - SCOPUS:85067822906

SN - 0169-4332

VL - 490

SP - 556

EP - 567

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Pitting corrosion of SLM Inconel 718 sample under surface and heat treatments

Abstract

Keywords

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