ISSN:
1662-9752
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:
This paper described an experimental study on the friction stir welding of dissimilarmetal between commercially pure titanium (CPTi) and magnesium alloy AZ31B (Mg). Butt-weldsproduced at various tool rotation speeds were evaluated by the observation of the weld surfaceappearance, X-ray radiographic test, tensile test, SEM and EDX analysis. The main results obtainedare as follows. Butt-joint welding of the CPTi plate to the Mg plate was easily and successfullyachieved. The ignition of Mg occurred during welding at the tool rotation speeds over 1200rpm.The fragments of CPTi existed in a continuous form in Mg matrix. The tool rotation speed of1200rpm attained the maximum tensile strength of a joint, which was about 75% of that of Mg basemetal. Fracture occurred at the weld interface in most joint. EDX analysis revealed that Al in theMg diffused into CPTi through the weld interface and MgO existed at the interface. It seems thatthe decrease in Al concentration in the Mg and MgO formation around the weld interface caused thelow tensile strength of the joints
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3856.pdf
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