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:
Grain refinement and high temperature deformation in two kinds of magnesium alloyssubjected to friction stir processing (FSP) have been investigated. One was a rolled sheet ofLA141Mg and another was a cast plate of AZ91Mg. FSP was developed by adapting the concepts offriction stir welding to obtain a fine grain size in a stirred zone. Grain refinement was achieved by FSPto give fine grain sizes of 11.4μm and 8.4μm for LA141 and AZ91 alloys, respectively. For LA141alloy, the maximum stress of the FSPed sample was higher than that of the as-received one in therange of 300K to 523K while the elongation to failure of the former was considerably smaller thanthat of the latter. On the other hand, the elongation for the FSPed sample of AZ91Mg showed threetimes larger elongation with a lower maximum stress than the as-received cast one at 523K and2.8×10-3s-1. Further difference in high temperature deformation for both magnesium alloys wasdiscussed based on microstructural change and stress-strain curves
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.551-552.55.pdf
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