Fatigue Crack Propagation Properties of Welded Joints at 300°C-Reference-Cited by-同舟云学术

Fatigue Crack Propagation Properties of Welded Joints at 300°C

Published:2003-05-01 Issue:2 Volume:125 Page:131-135
ISSN:0094-9930
Container-title:Journal of Pressure Vessel Technology
language:en
Short-container-title:

Author:

Ohta Akihiko¹,Suzuki Naoyuki¹,Maeda Yoshio¹

Affiliation:

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

Abstract

Fatigue crack propagation properties of welded joints were investigated on steel plate for boilers and other pressure vessels. The fatigue crack propagation properties at 300°C became similar to those at room temperature when the thermal stress could be reduced down to −1 MPa by using center cracked type specimen with longitudinal slits and a specially designed furnace. The tensile residual stress was +152 MPa in the as-welded joint, and +12 MPa after PWHT. The fatigue threshold was about 2.7, 5.1 and 7.3 MN/m3/2 for weld metal in the as-welded condition, after PWHT and the base metal, respectively.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Link

http://asmedigitalcollection.asme.org/pressurevesseltech/article-pdf/125/2/131/5480650/131_1.pdf

Reference9 articles.

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.