TY - JOUR
T1 - Estimating densities of liquid transition-metals and Ni-base superalloys
AU - Sung, P. K.
AU - Poirier, D. R.
AU - McBride, E.
N1 - Funding Information:
This work was supported by the Advanced Research Projects Agency, as part of the Micromodeling Program of the Investment Casting Cooperative Arrangement, under contract MDA972-93-2-0001. The authors very much appreciate Dr Dan Backman of General Electric Aircraft Engines, Dr Boyd Mueller of Howmet Research Center, Dr Anthony Giamei of the United Technologies Research Center, and Dr Tony Overfelt of Auburn University for providing densities of the commercial alloys. We also thank Dr W. Boettinger of NIST for always being available to discuss our work.
PY - 1997/7/15
Y1 - 1997/7/15
N2 - To estimate the densities of liquid Ni-base superalloys, the densities and temperature coefficients of density (dρ/dT) of the liquid transition-metals, which are used as alloy elements in Ni-base superalloys, were gathered, reviewed, and applied to a simple correlation. The correlation is particularly useful to estimate dρ/dT of many transition-metals for which there are no data available. To demonstrate how the results can be applied, the densities of liquid Ni-rich Ni-Al-Cr-Ta alloys were considered and regressed to yield the liquid density as a function of temperature and composition. As a verification of this approach, the liquid densities of five Ni-base superalloys were also estimated. By including a regression estimate of the molar mixing volume, the estimates of the liquid densities agreed with the measured values to ±2.5%.
AB - To estimate the densities of liquid Ni-base superalloys, the densities and temperature coefficients of density (dρ/dT) of the liquid transition-metals, which are used as alloy elements in Ni-base superalloys, were gathered, reviewed, and applied to a simple correlation. The correlation is particularly useful to estimate dρ/dT of many transition-metals for which there are no data available. To demonstrate how the results can be applied, the densities of liquid Ni-rich Ni-Al-Cr-Ta alloys were considered and regressed to yield the liquid density as a function of temperature and composition. As a verification of this approach, the liquid densities of five Ni-base superalloys were also estimated. By including a regression estimate of the molar mixing volume, the estimates of the liquid densities agreed with the measured values to ±2.5%.
KW - Density
KW - Liquid-transition metals
KW - Superalloys
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U2 - 10.1016/s0921-5093(97)00074-9
DO - 10.1016/s0921-5093(97)00074-9
M3 - Article
AN - SCOPUS:0031192795
VL - 231
SP - 189
EP - 197
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 1-2
ER -