### Hydrogen Effervescence from Aluminum Alloy MeltsHydrogen Effervescence from Aluminum Alloy Melts

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 Author Mitrašinović, Aleksandar M. ♦ D’Souza, Ryan Source SpringerLink Content type Text Publisher Springer US File Format PDF Copyright Year ©2012 Language English
 Subject Domain (in DDC) Technology ♦ Engineering & allied operations Subject Keyword Environment ♦ Engineering ♦ Earth Sciences ♦ Chemistry/Food Science ♦ Physics Abstract With expansion of integrated computational materials engineering, new mathematical models are required for the assessment of processes that traditionally were manually monitored on factory production floors. The Richards logistic function is used to describe the total amount of porosity in an as-cast aluminum alloy sample after treatment under near vacuum and atmospheric pressures. The acquired function constants were correlated to the different process parameters during solidification. It is found that the Richards logistic function describes the best formation of porosity in aluminum alloy melts. The maximum porosity (M $_{P}$) and lowest porosity level (L $_{P}$) constants are directly related to the highest and lowest porosity levels in the analyzed samples, while the rate (r) defines the increase of porosity with respect to an increase in dissolved hydrogen between the threshold and mass transfer limits. The Richards logistic function can be used instead of traditional low-order mathematical equations to predict threshold limit and amount of porosity in solidified aluminum alloys by assessing the hydrogen concentration in aluminum alloy melts. ISSN 10474838 Age Range 18 to 22 years ♦ above 22 year Educational Use Research Education Level UG and PG Learning Resource Type Article Publisher Date 2012-11-07 Publisher Institution The Minerals, Metals & Materials Society (TMS) Publisher Place Boston e-ISSN 15431851 Journal JOM Volume Number 64 Issue Number 12 Page Count 5 Starting Page 1448 Ending Page 1452