Experimental and modeling investigation of the thermal shock behavior of TiC-based self-healing coatings on AISI 321 stainless steel

Wei Li; Chipeng Zhang; Shunpeng Zhu; Cong Li; Guowei Bo; Shengnan Hu; Dapeng Jiang; Hui Chen; Jianjun He; Shengde Zhang; Anqi Chen; Jian Chen

Materials & Design (Oct 2024)

Experimental and modeling investigation of the thermal shock behavior of TiC-based self-healing coatings on AISI 321 stainless steel

Wei Li,
Chipeng Zhang,
Shunpeng Zhu,
Cong Li,
Guowei Bo,
Shengnan Hu,
Dapeng Jiang,
Hui Chen,
Jianjun He,
Shengde Zhang,
Anqi Chen,
Jian Chen

Affiliations

Wei Li: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China; Changsha Environmental Protection College, Changsha 410004, China
Chipeng Zhang: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China
Shunpeng Zhu: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China; School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu, China; Corresponding author at: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China.
Cong Li: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China; Corresponding authors.
Guowei Bo: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China; Corresponding authors.
Shengnan Hu: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China
Dapeng Jiang: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China
Hui Chen: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China; School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410114, China
Jianjun He: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China
Shengde Zhang: Japan Electric Power Central Research Institute, Tokyo 240-0196, Japan
Anqi Chen: Changsha Environmental Protection College, Changsha 410004, China
Jian Chen: School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China

Journal volume & issue: Vol. 246
p. 113353

Abstract

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The AISI 321 steels of structural components serviced at high temperature are usually subjected to oxidation and thermal shock damage during service. Therefore, to improve their high-temperature oxidation and thermal shock resistance, the self-healing coating consisting of Al2O3-13 %TiO2 layer, TiC layer and NiCrAlY layer was prepared for 321 steels in this work. The experimental and microstructural characterization results showed that the thermal shock resistance of such self-healing coating was remarkably improved as compared to the counterpart double-AT13 coating. This is because the volume increment resulting from the oxidation reaction between the TiC and oxygen decreased the porosity of the self-healing coating and retarded crack growth, which also led to the improved high-temperature oxidation resistance. Further, a thermal shock life model based on the crack growth model of Paris formula were developed. The modeling results not only agreed well with the experimental results but also indicated that thickening of thermal grown oxide (TGO) is the main cause of crack initiation and growth.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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