ISSN:
1013-9826
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:
Al-Li alloys are characterized by a strong anisotropy in mechanical properties andmicrostructure with respect to the rolling direction. Plates of 2198 Al-Li alloy were friction stirwelded by employing maximum rotation speed: 1000 rev/min and welding speed of 80 mm/min,both in parallel and orthogonal directions with respect to the rolling one. The joints mechanicalproperties were evaluated by means of tensile tests at room temperature. In addition, fatigue testsperformed with a resonant electro-mechanical testing machine under constant amplitude control upto 250 Hz loading, were conducted in axial control mode with R(σmin/σmax)=0.33, for all thewelding and rotating speed conditions. The fatigue crack propagation experiments were performedby employing single edge notched specimens.With the aim to characterize the weld performances,both the microstructure evolution at jointed cross sections, related to the welding variables, and thefractured surfaces were respectively analyzed by means of optical and scanning electronmicroscopy
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.385-387.849.pdf
Permalink