Stress intensity factor and fatigue crack propagation assessment of mode-I failure in alumina-calcium hexaluminate refractories

Guanglin Dong; Liping Pan; Tian Huang; Yichen Chen; Ning Liao; Tianbin Zhu; Qinghu Wang; Sijia Liang; Jun Xu; Yu Wang

Open Ceramics (Sep 2023)

Stress intensity factor and fatigue crack propagation assessment of mode-I failure in alumina-calcium hexaluminate refractories

Guanglin Dong,
Liping Pan,
Tian Huang,
Yichen Chen,
Ning Liao,
Tianbin Zhu,
Qinghu Wang,
Sijia Liang,
Jun Xu,
Yu Wang

Affiliations

Guanglin Dong: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
Liping Pan: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China; Corresponding author. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China.
Tian Huang: Geotechnical Institute, TU Bergakademie Freiberg, 09599, Freiberg, Germany
Yichen Chen: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
Ning Liao: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
Tianbin Zhu: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
Qinghu Wang: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
Sijia Liang: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
Jun Xu: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
Yu Wang: The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China; National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, China

Journal volume & issue: Vol. 15
p. 100422

Abstract

Read online

Alumina-calcium hexaluminate refractories experience crack development under severe conditions, leading to a significant reduction in mechanical strength. The external finite element method and Paris' law were employed to investigate the effects of external load and in-situ crack length on stress intensity factor. Fatigue life and crack propagation process of refractories were simulated for varying CAx contents under Model I failure. The findings revealed a linear correlation between the stress intensity factor and external load for a fixed in-situ crack length (a≤16 mm). The ultimate strength of alumina-calcium hexaluminate refractories is inversely proportional to the in-situ crack length. The material's microstructure significantly influences the ultimate strength of refractories, whereas the crack propagation ratio at the interface-to-the aggregate level strongly affects fatigue life. Refractories with a CAx content of 29.78% exhibit the longest fatigue life, attributed to the favorable formation of CA6/CA2 and the highest interface-to-aggregate crack propagation ratio.

Published in Open Ceramics

ISSN: 2666-5395 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Chemical technology: Clay industries. Ceramics. Glass
Website: https://www.journals.elsevier.com/open-ceramics

About the journal

Abstract

Keywords