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Chen, C. Y.; Huang, Jeng‐Yi; Yeh, J. J.; Kuo, R.C.; Hwang, Jiun Ren; Huang, Jiunn-Yuan

doi:10.1023/a:1021817216519

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…A lot of researchers [3,11,[30][31][32][33][34][35][36] have observed a strong dependence of dislocation structures on the fatigue test conditions. The fatigued specimens were examined by TEM and the misorientation between two neighboring sub-grains also analyzed.…”

Section: Dislocation Structure and Sub-grain Misorientationmentioning

confidence: 99%

Dynamic strain aging and grain size reduction effects on the fatigue resistance of SA533B3 steels

Huang

Hwang

Yeh

et al. 2004

Journal of Nuclear Materials

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Section: Dislocation Structure and Sub-grain Misorientationmentioning

confidence: 99%

Dynamic strain aging and grain size reduction effects on the fatigue resistance of SA533B3 steels

Huang

Hwang

Yeh

et al. 2004

Journal of Nuclear Materials

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“…To calculate the minimum required margin of safety for a metal construction in emergency conditions, it is important to know the effects of extreme temperatures and force conditions on the mechanical properties of the material. Such data are available in the literature, but they mainly concern the static strength and impact strength [12,13]. At the same time, the most important property of a structural material is its fatigue strength.…”

Section: Introductionmentioning

confidence: 99%

Influence of Overheating on High-Cycle Fatigue Characteristics of the Base Metal and Weld Metal of Low-Carbon Steel Welded Joints

Nikulin,

Rogachev,

Prosvirnin

et al. 2023

Metals

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The results of a high-cycle fatigue testing of our samples were obtained, and a comparative assessment of the properties of the base metal and weld metal of 09G2S-type steel (13Mn6 according to the DIN17145-80 standard) before and after overheating (1200 °C, 3.7 h) was performed. The welded joints between the sheets of 09G2S steel were obtained through automatic argon arc welding. The fatigue tests were carried out under repeated tensile loading. The “maximum cycle stress—number of cycles to failure” fatigue curves of the samples were plotted. The fracture surfaces of the samples were studied, and the fatigue failure mechanisms were analyzed. It was shown that, during testing, all samples demonstrated cyclic hardening behavior. The samples of the base metal as delivered had the highest endurance limit, and the smallest endurance limit was found in the samples of the base metal and weld metal after overheating, the endurance limits of which were similar. The fracture mechanism of all samples was quasi-brittle with the presence of very thin fatigue micro-grooves. The final rupture of all samples had a ductile dimple type.

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“…Fatigue is one of the main degradation mechanisms affecting the pressure vessel integrity of pressurised water reactors (PWR) and boiling water reactors (BWR). [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] The fatigue crack growth rates of RPV materials in simulated light water reactor (LWR) environments are greatly influenced by sulphur content and sulphide morphology. 9,10,[16][17][18] The sulphur content has also been reported to be detrimental to the fracture toughness of low alloy steels.…”

Section: Introductionmentioning

confidence: 99%

Effect of dynamic strain aging on fatigue crack growth behaviour of reactor pressure vessel steels

Huang¹,

Yeh²,

Kuo³

et al. 2006

Materials Science and Technology

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Fatigue tests under constant amplitude load were conducted on compact tension specimens of SA533B3 steels with four levels of sulphur content at different temperatures. A modified capacitance type crack opening displacement (COD) gauge was shown to be suitable for fatigue crack length measurement at high temperatures. Test results obtained with different measurement techniques show good consistency. The observation that the Young's moduli measured at a strain rate of 4610 23 s 21 for the SA533B3 steels at 150 and 300uC do not decrease with increasing temperature seems to be related to the presence of dynamic strain aging. The fatigue crack growth rates at 150 and 300uC are about two and half times slower than those tested at 400uC because dynamic strain aging prevails at 150 and 300uC. Fractographic examination results suggest that inclusions embedded in secondary cracks enhanced the fatigue crack initiation rather than the fatigue crack growth.

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Cited by 12 publications

References 2 publications

Dynamic strain aging and grain size reduction effects on the fatigue resistance of SA533B3 steels

Dynamic strain aging and grain size reduction effects on the fatigue resistance of SA533B3 steels

Influence of Overheating on High-Cycle Fatigue Characteristics of the Base Metal and Weld Metal of Low-Carbon Steel Welded Joints

Effect of dynamic strain aging on fatigue crack growth behaviour of reactor pressure vessel steels

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