Electronic Resource
s.l. ; Stafa-Zurich, Switzerland
Solid state phenomena
Vol. 124-126 (June 2007), p. 1321-1324
ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Fatigue crack propagation (FCP) behavior of friction stir welded (FSWed) 6061-T651 Alalloy was examined with the fatigue crack growing either along the dynamically recrystallized zone(DXZ) at variable [removed info]K or perpendicular to the DXZ at a constant [removed info]K value of 7.5, 10 and 15 MPa√m,respectively. The FCP rates in the DXZ tended to be significantly lower than those in the PMparticularly in low [removed info]K regime. Compressive residual stress reducing effective [removed info]K cannot be solelyresponsible for the enhanced FCP resistance. The fine recrystallized grains in the DXZ causingintergranular fatigue failure appeared to be detrimental to the FCP behavior of FSWed 6061-T651specimen. The constant [removed info]K fatigue test across the weld zone showed that substantial crackretardation occurred far beyond the heat affected zone (HAZ) at low [removed info]K regime. The FCP behavior ofFSWed 6061-T651 is discussed based on residual stress measurement and fractographic observation
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.1321.pdf
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