Microstructure, high-temperature cyclic oxidation, and hot corrosion behaviors of Inconel 718 alloy produced by laser-induction hybrid cladding

Lei Qin; Pan Ren; Yanliang Yi; Dongchu Chen; Yang Lu; Daxiang Sun; Changliang Shi; Shengfeng Zhou

Journal of Materials Research and Technology (Sep 2024)

Microstructure, high-temperature cyclic oxidation, and hot corrosion behaviors of Inconel 718 alloy produced by laser-induction hybrid cladding

Lei Qin,
Pan Ren,
Yanliang Yi,
Dongchu Chen,
Yang Lu,
Daxiang Sun,
Changliang Shi,
Shengfeng Zhou

Affiliations

Lei Qin: Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou, 510632, China
Pan Ren: Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou, 510632, China
Yanliang Yi: Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou, 510632, China
Dongchu Chen: School of Materials Science and Energy Engineering, Foshan University, Guangdong, 52800, China
Yang Lu: Department of Mechanical Engineering, The University of Hong Kong, Pokfulam, 999077, Hong Kong SAR, China
Daxiang Sun: Center for Industrial Analysis and Testing, Guangdong Academy of Sciences, Guangzhou, 510650, China
Changliang Shi: Center for Industrial Analysis and Testing, Guangdong Academy of Sciences, Guangzhou, 510650, China
Shengfeng Zhou: Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou, 510632, China; Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, 430074, China; Corresponding author. Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou, 510632, China.

Journal volume & issue: Vol. 32
pp. 550 – 564

Abstract

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The microstructure evolution, cyclic oxidation, and hot corrosion behavior of the unheated-treated (As-built) and solution + double aging (SDA)-treated Inconel 718 alloys fabricated through laser-induction hybrid cladding (LIHC) were investigated. It was found that the as-built Inconel 718 alloy exhibits a columnar dendritic with intergranular Laves phase. After SDA-treated, γ'', γ′, δ and carbide phases precipitated, the Laves phase became fine and dispersed. After cyclic oxidation, the Cr2O3 scales were formed on both as-built and SDA-treated LIHC-produced Inconel 718 alloy, which could provide good cyclic oxidation resistance for the Inconel 718 alloy. However, the as-built and SDA-treated LIHC-produced Inconel 718 alloy suffered severe hot corrosion in 95 wt% Na2SO4 + 5 wt% NaCl mixed salt solution and many corrosion products were generated, including Cr2O3, NiCr2O4, NaNbO3, Na2CrO4, NiFe2O4, Fe3O4, and NiO. Nevertheless, the SDA-treated sample showed better cyclic oxidation and hot corrosion resistance than the as-built sample, owing to the more compact Cr2O3 scale.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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