ISSN:
1662-8985
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:
Hot cracking of ternary Mg-Al-Ca alloys in permanent mold casting was studied. Thealloys are the base of some potential creep-resistant Mg alloys. The Mg-xAl-yCa alloys includedMg-4Al-1Ca, Mg-4Al-2Ca, Mg-4Al-3Ca, Mg-4Al-4Ca, Mg-5Al-3Ca, and Mg-6Al-3Ca.Constrained-rod casting was conducted with a steel mold. Rods were cast with their ends enlargedto act as anchors, which kept the rods from free contraction and thus induced tension in the rods tocause cracking during solidification. The susceptibility to hot cracking was evaluated based on boththe widths and locations of cracks in the resultant castings. Both binary Mg-4Al and commercialalloy AZ91E, which is known to have a low susceptibility to hot cracking, were also included forcomparison. It was found that within the composition range studied, the crack susceptibilitydecreased significantly with increasing Ca content (y) but did not change much with the Al content(x)
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.501.pdf
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