Fatigue Crack Propagation Properties of Welded Joints at 300°C

[+] Author and Article Information
Akihiko Ohta, Naoyuki Suzuki, Yoshio Maeda

National Institute for Materials Science, Materials Engineering Laboratory, 1-2-1 Sengen, Tsukuba-shi, Ibaraki 305-0047, Japan

J. Pressure Vessel Technol 125(2), 131-135 (May 05, 2003) (5 pages) doi:10.1115/1.1563628 History: Received May 02, 2002; Revised February 03, 2003; Online May 05, 2003
Copyright © 2003 by ASME
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ASME, 1977, Boiler and Pressure Vessel Code, Section XI, Rules for Inspection of Nuclear Power Plant and Components, Division 1, Appendix A, The American Society of Mechanical Engineers, New York, pp. 175–188.
JWES, 1977, Method of Assessment for Flaws in Fusion Welded Joints with Respect to Brittle Fracture and Fatigue Crack Growth, WES 2805, The Japan Welding Engineering Society, Tokyo, pp. 18–19, and pp. E13-E40.
Ohta,  A., Kosuge,  M., Matsuoka,  S., Takeuchi,  E., Muramatsu,  Y., and Nishijima,  S., 1988, “Significance Effect of Thermal Stress on Fatigue Crack Propagation Properties,” Int. J. Fract., 38, pp. 207–216.
Ohta,  A., Sasaki,  E., Kamakura,  M., Nihei,  M., Kosuge,  M., and Inagaki,  M., 1981, “Effect of Residual Tensile Stress on Threshold Level for Fatigue Crack Propagation in Welded Joints of SM50B Steel,” Trans. Japan Weld. Soc.,12, pp. 31–38.
Ohta,  A., Kosuge,  M., Mawari,  T., and Nishijima,  S., 1988, “Fatigue Crack Propagation Properties of HT80 Steel Welded Joints Heat Treated for Relieving Residual Stress,” Trans. NRIM, 30 , pp. 8–14.
Ohta,  A., Suzuki,  N., and Maeda,  Y., 1997, “Unique Fatigue Threshold and Growth Properties of welded Joints in Tensile Residual Stress Field,” Int. J. Fatigue, 15, pp. s303–s310.
Ohta,  A., Kosuge,  M., Mawari,  T., and Nishijima,  S., 1988, “Fatigue Crack Propagation in Tensile Residual Stress Field of Welded Joints under Fully Compressive Cycling,” Int. J. Fatigue, 10, pp. 237–242.
Matsuoka,  S., Takeuchi,  E., Kosuge,  M., Ohta,  A., and Nishijima,  S., 1986, “A Method for Determining Conservative Fatigue Threshold by Avoiding Crack Closure,” J. Test. Eval., 14, pp. 312–317.
Ohta,  A., Soya,  I., Nishijima,  S., and Kosuge,  M., 1986, “Statistical Evaluation of Fatigue Crack Propagation Properties Including Threshold Stress Intensity Factor,” Eng. Fract. Mech., 24, pp. 789–802.


Grahic Jump Location
Compressive thermal stress induced around middle part of center cracked type specimen which was heated around narrow band of cracked area
Grahic Jump Location
Superior fatigue crack propagation properties at 300°C due to compressive thermal stress around crack tip
Grahic Jump Location
Details of specimen—(a) room temperature, (b) 300°C
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ΔK shedding process in Pmax hold fatigue crack propagation test
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Temperature distribution along centerline of specimen
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Thermal stress induced around middle part of center cracked type specimen which was heated around broad center area
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Fatigue crack propagation properties of SB450 steel
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Residual stress distribution




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