Volume 45, Issue 10 pp. 3086-3101
SPECIAL ISSUE ARTICLE

Establishment of unified creep–fatigue life prediction under various temperatures and investigation of failure physical mechanism for Type 304 stainless steel

Le Xu

Le Xu

Graduate School of Science and Engineering, Ritsumeikan University, Kusatsu-shi, Shiga, Japan

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Run-Zi Wang

Run-Zi Wang

Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, Sendai, Miyagi, Japan

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Lei He

Corresponding Author

Lei He

College of Science and Engineering, Ritsumeikan University, Kusatsu-shi, Shiga, Japan

Correspondence

Lei He, College of Science and Engineering, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu-shi, Shiga, 525-8577, Japan.

Email: [email protected]

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Xian-Cheng Zhang

Xian-Cheng Zhang

Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, China

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Shan-Tung Tu

Shan-Tung Tu

Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, China

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Hideo Miura

Hideo Miura

Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, Sendai, Miyagi, Japan

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Takamoto Itoh

Takamoto Itoh

College of Science and Engineering, Ritsumeikan University, Kusatsu-shi, Shiga, Japan

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First published: 17 July 2022
Citations: 2

Funding information: Japan Society for the Promotion of Science, Grant/Award Numbers: JP18K03854, 21F50350; Postdoctoral Fellowships for Research in Japan, Grant/Award Numbers: FY2020, P20350; National Natural Science Foundation of China, Grant/Award Numbers: 52005185, 51725503, U21B2077; China Scholarship Council, Grant/Award Number: csc201906745018

Abstract

Investigations into creep–fatigue life and the corresponding failure physical mechanism are crucial for guaranteeing the structural integrity of components. In this work, a series of strain-controlled fatigue and creep–fatigue tests were performed at different temperatures. Then, the EBSD-TEM combinative analysis was performed to reveal the microstructure evolution. The creep failure parameter dependence derived from standard creep experimental data and their importance in further creep–fatigue employment were discussed. Results show that strain energy density has better relevance than ductility in connecting with creep failure. The temperature-dependent critical strain energy density and an equivalent failure strain energy density, considering geometric effect, were incorporated with the current energy-based model, which enables creep–fatigue life scatter within a factor of 1.5. Moreover, multi-slip activations and severe slip interactions under creep–fatigue conditions were responsible for the ultimately lifetime reductions based on microstructure observations.

CONFLICT OF INTEREST

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.

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