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:
The effect of friction stir welding (FSW) parameters on microstructure and properties of15vol.%SiCp/2009Al composite welds was investigated at tool rotation rates of 400-1000 rpm for aconstant welding speed of 50 mm/min. 8mm thick defect-free welds were produced at higher toolrotation rates of 600-1000 rpm, whereas an unwelded seam was distinctly visible at the root of platesat a lower tool rotation rate of 400 rpm. FSW resulted in generation of fine and equiaxed recrystallizedgrains of ~6 μm and significant improvement of SiC particle distribution in the weld nugget. Underas-FSW condition, the hardness of the weld nugget was significantly higher than that of as-extrudedparent material. Furthermore, tensile and yield strengths of as-FSW composite welds in both thelongitudinal and transverse directions were superior to those of as-extruded parent material.Post-weld T4 temper resulted in limited grain growth due to the pinning of SiC particles. Under theT4 condition, the tensile strength of the welds along the longitudinal and transverse directions reached82 and 95% of the parent material, respectively
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3814.pdf
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