Thermal Fatigue Behavior of Ladle Purging Plug

Hui Zhang; Yan Ruo Hong; Hong Xia Li; Yang Bin

doi:10.4028/www.scientific.net/AMR.105-106.158

Paper Titles

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Application of ANN Back-Propagation for Residual Stress in an Alloy Reinforced Ceramics/Metal Composite
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Thermal Fatigue Behavior of Ladle Purging Plug
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 105-106Thermal Fatigue Behavior of Ladle Purging Plug

Thermal Fatigue Behavior of Ladle Purging Plug

Abstract:

The thermal fatigue behavior of alumina-magnesia based and alumina-chromia based purging plug materials are comparatively studied. By comparing thermal shock parameters, the changes of elastic modulus and hot modulus of rupture after thermal shock cycles, we come to a conclusion that microcracks emerge in the alumina-magnesia based material, which hinder the crack growth during thermal shock cycles. The fine-grained and network structure of alumina-magnesia based material are also helpful to improve thermal shock resistance. However, cracks are difficult to form in the alumina-chromia based material but it tends to fracture damage quickly once the cracks nucleation due to coarse-grained structure of alumina-chromia based material.