Digitale Medien
s.l. ; Stafa-Zurich, Switzerland
Materials science forum
Vol. 488-489 (July 2005), p. 189-192
ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
The microstructure of three dilute Mg-Mn and two dilute Mg-Zr alloys which had beenheat treated at different temperatures and times were studied using optical microscopy and various electron optical techniques, including FEGSEM and TEM. It was found that the Mg-Zr alloys homogenized at 500℃ and annealed at 350℃ contained a fine dispersion of Zr-containing particles at grain boundaries and within grains. In contrast, annealing Mg-Zr alloys at 300℃ for up to 3 h led to little modification of the as-cast structures. When the Mn content was less than 0.9 weightpercent, homogenization of the Mg-Mn alloys at 550 to 600℃ resulted in the dissolution of small rod-like and needle-shape particles, which then grown up as fine particles when aged at 300℃. Mg- 0.6Mn and Mg-0.9Mn alloys annealed at 300 to 400℃ without solution treatment contained a large volume fraction of nano-sized precipitates
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/10/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.488-489.189.pdf
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