Creep Crack Growth Behavior of N18 Zircaloy Thin-Walled Tubes with Double Edged Axial-Notched Cracks

Li Zhihao; Bao Chen; Wang Bo; Liu Xiaokun

Volume 41 Issue 5

Sep. 2020

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Article Navigation > Nuclear Power Engineering > 2020 > 41(5): 53-59

Li Zhihao, Bao Chen, Wang Bo, Liu Xiaokun. Creep Crack Growth Behavior of N18 Zircaloy Thin-Walled Tubes with Double Edged Axial-Notched Cracks[J]. Nuclear Power Engineering, 2020, 41(5): 53-59.

Citation:

Li Zhihao, Bao Chen, Wang Bo, Liu Xiaokun. Creep Crack Growth Behavior of N18 Zircaloy Thin-Walled Tubes with Double Edged Axial-Notched Cracks[J]. Nuclear Power Engineering, 2020, 41(5): 53-59.

Li Zhihao, Bao Chen, Wang Bo, Liu Xiaokun. Creep Crack Growth Behavior of N18 Zircaloy Thin-Walled Tubes with Double Edged Axial-Notched Cracks[J]. Nuclear Power Engineering, 2020, 41(5): 53-59.

Citation:

Li Zhihao, Bao Chen, Wang Bo, Liu Xiaokun. Creep Crack Growth Behavior of N18 Zircaloy Thin-Walled Tubes with Double Edged Axial-Notched Cracks[J]. Nuclear Power Engineering, 2020, 41(5): 53-59.

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Creep Crack Growth Behavior of N18 Zircaloy Thin-Walled Tubes with Double Edged Axial-Notched Cracks

Publish Date: 2020-09-27

Abstract

Abstract

Through the design of double edged axial-notched tube (DEAT) specimen and fixture, the expression of C* integral of DEAT specimen was obtained based on the principles of energy equivalent and load separation. A test method for the creep crack growth rate of thin-walled tubes with axial cracks has been established. The creep crack growth tests of N18 zircaloy thin-walled tubes at different load levels at 350℃ are carried out by using DEAT specimens. The results show that the creep load will significantly affect the creep crack growth rate of N18 zircaloy; the creep crack growth can be divided into two stages: steady state expansion and rapid expansion; the creep crack growth rate (da/dt) and C* integral have a good power-law relationship, and it can be used to predict the creep crack growth behavior of N18 zircaloy.
- Double edged axial-notched tube (DEAT),
- N18 zircaloy thin-walled tube,
- Creep crack growth,
- C* integral

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