ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Fatigue strength of Al5083-O FSW joints was evaluated in the relation of the FSWconditions. Static strength of the joints in a range of FSW conditions was the same as that of basemetal. Because the fracture of the joints occurred at the base metal in the tensile tests. Therefore thejoint efficiency in tensile strength of joints with the FSW condition of tool rotation: 800 rpmweldingspeed: 100 mm/min (800-100), 800-200 and 500-100 are all hundred percent. However, thefatigue strength of those joints with fine static strength varied very much. The joint efficiency forfatigue strength varies from 75% for 500-100 to 31% for 800-200. Crack path in fatigue test wasalways initiated at the center of back surface of FSW weld zone, and propagated through stir zone.Crack growth rate measurement and fracture surface analysis resulted the difference of the jointefficiency has a connection with the incomplete welding at back surface of joints
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.559.pdf
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