Changes of the Fracture Toughness of ZG40Cr25Ni20 Furnace Tube after Service and the Corresponding Change of the Microstructure of the Fracture Surface

Jia Sheng He; Xiong Hu; Xiao Ming Zhu

doi:10.4028/www.scientific.net/AMM.853.262

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 853Changes of the Fracture Toughness of ZG40Cr25Ni20...

Changes of the Fracture Toughness of ZG40Cr25Ni20 Furnace Tube after Service and the Corresponding Change of the Microstructure of the Fracture Surface

Abstract:

According to the principle of fracture mechanics, the fracture toughness of the furnace tube after 30000 hours service and new furnace tube were tested with the MTS810 tester. The microstructure of fracture surface were analysed by the SEM. The results show that the fracture toughness of the furnace tube after service decreases greatly compared with that of the new furnace tube. The microstructure of fracture surface of the furnace tube changes significantly corresponding to the change of the fracture toughness.

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Periodical:

Applied Mechanics and Materials (Volume 853)

Pages:

262-265

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.853.262

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Online since:

September 2016

Authors:

Jia Sheng He*, Xiong Hu, Xiao Ming Zhu

Keywords:

Fracture Mechanics, Fracture Toughness, Furnace Tube, Microstructure

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