High stress corrosion cracking resistance of in-situ nanoparticle strengthened steel

Rongjian Shi; Yanqi Tu; Kewei Gao; Lijie Qiao; Xiaolu Pang

Corrosion Communications (Mar 2022)

High stress corrosion cracking resistance of in-situ nanoparticle strengthened steel

Rongjian Shi,
Yanqi Tu,
Kewei Gao,
Lijie Qiao,
Xiaolu Pang

Affiliations

Rongjian Shi: Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China; School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Yanqi Tu: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Kewei Gao: Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Lijie Qiao: Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
Xiaolu Pang: Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; Corresponding author.

Journal volume & issue: Vol. 5
pp. 14 – 24

Abstract

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Stress corrosion cracking (SCC) is extremely detrimental to the long-term applications of high-strength low-alloy steels. In this work, the critical effects of the dimension and morphology of the non-metallic inclusions on the SCC susceptibility and pitting corrosion were investigated. With the trace-element regional supply method, the inclusions are transformed from the detrimental sharp-edged (Ti, V)N and enormous MnS into globular or elliptical Al2O3 and multicomponent inclusions with small dimensions (3.41 ± 2.36 μm) and high equivalent shape factor (0.93 ± 0.02) in the in-situ nanoparticles strengthened steel. As a result, the corrosion current, depth and diameter of pits, and roughness of the surface were reduced with suppression of pitting corrosion. The superior SCC resistance in the in-situ nanoparticles strengthened steel was obtained by inclusion refinement. The strategy of inclusion refinement by in-situ nanoparticles is beneficial for designing SCC resistant steels.

Published in Corrosion Communications

ISSN: 2667-2669 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/corrosion-communications

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