The fatigue life improvement of high strength steel welded joints using hammer peening techniques

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:205420

Bell, R; Militaru, D V ^[1]; Braid, J E.M. ^[2]

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1. Carleton Univ., Ottawa, Ontario (Canada). Dept. of Mechanical and Aerospace Engineering
2. Canada Centre for Materials and Metals Technology, Ottawa, Ontario (Canada). Metals Technology Labs.

The fatigue strength of welded joints can be substantially improved by a number of methods. This paper will investigate the high cycle fatigue strength that is attainable in joints of high strength steels in the as-welded and hammer peened condition. A T-joint with a longitudinal fillet weld representing a stiffener or bracket end structural detail was selected for testing. These details are typical of joints found in ships, bridges and decks of offshore platforms. The specimens were fabricated from 350 MPa and 550 MPa yield strength grade steels and were loaded through the vertical member. During fatigue testing at several load levels the crack growth and crack shape development were monitored using potential drop and benchmarking techniques.

• OSTI ID: 205420
• Report Number(s): CONF-950695--; ISBN 0-7918-1309-6
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
CRACK PROPAGATION
FATIGUE
MECHANICAL TESTS
OFFSHORE PLATFORMS
SHOT PEENING
STEELS
STRAIN HARDENING
ULTIMATE STRENGTH
WELDED JOINTS