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 main aim of the metallurgical investigation was to enhance our understandingof the role Cu and Si have on the development of shrinkage porosity in the as-cast structure,which in turn can affect high cycle fatigue (HCF) properties of Al-9Si-1Cu (W328) and Al-7Si-4Cu (W319) alloys. In order to achieve this objective a novel approach using thermalanalysis and calculated fraction solid techniques was developed to assess mushy zonekinetics, the state between the liquidus and solidus where a solid skeletal α-Al phase and theAl-Si eutectic phase grow at the expense of an inter-dendritic liquid. Specifically, the coolingcurve and calculated fraction solid curve were partitioned into segments, which reflectdifferent stages of feeding through the entire solidification event of the alloy. Each partitionedsegment corresponds to a stage of feeding, which in turn signifies a relative degree of poregrowth susceptibility. Two thermal analysis techniques, both using calibrated thermocouples,were used to precisely understand the solidification path for both the W319 alloy and theW328 alloy
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.392.pdf
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