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:
The development of new creep resistant magnesium alloys has become a major issue inrecent years. The alloys investigated in the present work are based on the binary system Mg-Sn. Snas major alloying element was chosen due to its high solid solubility over a wide temperature rangeand due to the possible formation of Mg2Sn intermetallic precipitates with a high meltingtemperature of about 770°C. These characteristics suggest that a fairly large volume fraction ofthermally stable Mg2Sn particles can be formed during solidification. This makes it possible that theMg-Sn alloys can be developed as creep resistant magnesium alloys. In fact, previous investigationsindicate that the Mg-Sn alloys have a comparable or even better creep property than AE42 alloy.The present work investigates the microstructure of Mg-Sn alloys with and without creepdeformation using SEM and TEM technique. The effects of microstructural inhomogeneity on thecreep response are presented. Based on the microstructural analysis, the mechanism responsible forimproving the creep resistance will be discussed. It is shown that the grain boundary sliding is adominant creep mechanism for the Mg-Sn binary alloy
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.561.pdf
