Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7963461 | Journal of Nuclear Materials | 2018 | 9 Pages |
Abstract
Effect of tempering on low cycle fatigue (LCF) behaviors of nuclear-grade deposited weld metal was investigated, and The LCF tests were performed at 350 °C with strain amplitudes ranging from 0.2% to 0.6%. The results showed that at a low strain amplitude, deposited weld metal tempered for 1 h had a high fatigue resistance due to high yield strength, while at a high strain amplitude, the one tempered for 24 h had a superior fatigue resistance due to high ductility. Deposited weld metal tempered for 1 h exhibited cyclic hardening at the tested strain amplitudes. Deposited weld metal tempered for 24 h exhibited cyclic hardening at a low strain amplitude but cyclic softening at a high strain amplitude. Existence and decomposition of martensite-austenite (M-A) islands as well as dislocations activities contributed to fatigue property discrepancy among the two tempered deposited weld metal.
Related Topics
Physical Sciences and Engineering
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Nuclear Energy and Engineering
Authors
X.Y. Cao, P. Zhu, Q. Yong, T.G. Liu, Y.H. Lu, J.C. Zhao, Y. Jiang, T. Shoji,