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http://dx.doi.org/10.14773/cst.2012.11.4.120

Fatigue crack growth behaviors of SA508 Gr.3 Cl.2 base and weld material in 290℃ water environment  

Cho, Pyungyeon (Department of Nuclear and Quantum Engineering, KAIST)
Kim, Jeong Hyeon (Department of Nuclear and Quantum Engineering, KAIST)
Jang, Changheui (Department of Nuclear and Quantum Engineering, KAIST)
Cho, Hyunchul (Doosan Heavy Industries & Construction Co., Ltd.)
Publication Information
Corrosion Science and Technology / v.11, no.4, 2012 , pp. 120-128 More about this Journal
Abstract
The fatigue crack growth behaviors of SA508 Gr.3 Cl.2 low alloy steel in high temperature water environment were investigated. Overall, weld metal showed similar crack growth rate as that of base metal. At 0.01 Hz, fatigue crack growth rate (FCGR) was higher than that in air while the difference was smaller at 0.1 Hz. Also, FCGR showed ${\Delta}K$ dependency at 0.1 Hz only, indicating that the environmental effect was much greater at slower loading frequency of 0.01 Hz. FCGR of SA508 Gr.3 Cl.2 low alloy steel was compatible to or smaller than the ASME Sec. XI fatigue reference curves in high temperature water environment.
Keywords
fatigue; crack growth rate; low alloy steel; base and weld; EAC;
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