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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Compressive thermal stress induced around middle part of center cracked type specimen which was heated around narrow band of cracked area
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Superior fatigue crack propagation properties at 300°C due to compressive thermal stress around crack tip
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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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