Measurement of the Densities of Nickel-Based Ternary, Quaternary and Commercial Alloys

Mukai, Kusuhiro; Li, Zushu; Fang, Liang

doi:10.2320/matertrans.45.2987

Cited by 21 publications

(23 citation statements)

References 6 publications

(9 reference statements)

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“…x Al (at %) The Al content (x Al ), the liquidus temperature (T L ), and the experimental temperature range (T min -T max ) for each alloy are also reported Mukai et al [15,19] have used two experimental methods to measure the density of liquid Ni and of a series of Ni-based alloys, both binary and complex multicomponent systems of industrial interests, aiming at assessing a general prediction model for the densities of liquid Nibased alloys [15].…”

Section: Densitymentioning

confidence: 96%

Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

et al. 2015

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The thermophysical properties, e.g., melting range, specific heat, solid fraction, density, and surface tension of four industrial Ni-based alloys, namely MC-2, CMSX-10, TMS-75, and LEK-94, have been determined within the ground-based experiments program of the ESA MAP ThermoProp project. The tests were performed under reducing atmosphere in order to lower the oxygen contamination. The results obtained have been compared with the corresponding data of Ni-based alloys available in literature. The new experimental data have been analyzed as a function of both temperature and alloy composition and interpreted by means of different thermodynamic models.

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Section: Densitymentioning

confidence: 96%

Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

et al. 2015

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“…The molar volume of liquid TMS75 superalloy was calculated from the measured density of liquid TMS 75 alloys. [8] The molar volume of Hf was used in the calculation since the partial molar volume of Hf was not obtained by measuring the densities of liquid Ni-Hf alloys, as described in Section E. It is assumed that the partial molar volume of Re is only the function of temperature.…”

Section: Partial Molar Volume Of Rementioning

confidence: 99%

“…The densities of the following systems were studied: liquid nickel, liquid binary Ni-i (i ϭ Cr, Co, W, Ta, Al, and Mo) alloys, liquid ternary alloys (NiCo-Al), liquid quaternary alloys (Ni-Co-Al-Cr, Ni-Co-Al-Mo, Ni-Cr-Al-Mo), and liquid Ni-based commercial alloys. [1,2,7,8] In some cases, the densities of Ni-based alloys have also been measured in mushy state using the two methods.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the densities of liquid Ni-based superalloys

Mukai

Mills

2005

Metall Mater Trans B

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The molar volume of nickel and the partial molar volumes of Cr, Co, W, Ta, Al, Mo, and Re are computed from the densities of liquid nickel and liquid Ni-based binary alloys measured by the modified sessile drop method (MSDM) and the modified pycnometric method (MPM). The molar volumes of Hf, Nb, and Ti are calculated from the literature density values of these elements. A prediction model for the densities of liquid Ni-based alloys is developed based on the obtained molar/partial molar volumes of the elements in liquid Ni-based alloys. The validity of this model is verified by the density data of liquid Ni-based ternary (Ni-Co-Al), quaternary (Ni-Co-Al-Cr, Ni-Co-Al-Mo, and Ni-Cr-Al-Mo), and commercial alloys measured by both MSDM and MPM. It is also verified by the density values of liquid Ni-based commercial alloys in the literature. It has been shown that the present model can provide reasonable estimation for the density and its temperature dependency of liquid Ni-based alloys. The difference between the predicted value and the measured/cited value is within Ϯ2.5 pct.

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“…For elemental Ni, and the binary Ni-Al and Ni-W systems, the Mukai model reproduces well the directly measured densities obtained at these same compositions and temperatures. [6,7] Thus, for the Ni 500 , Ni 400 Al 100 and Ni 473 W 27 systems, a comparison between the Mukai and AIMD results can be considered as representing a direct comparison between experimental measurements and calculations. For elemental Ni the agreement between measured and calculated values of V is at the level of 1.8% at T=1830 K, and 1.5% at T=1750 K. For Ni-Al and Ni-W, the agreement between experiment and theory is comparable, ranging between 0.6% and 1.5% at the two temperatures.…”

Section: Results and Analysismentioning

confidence: 99%

“…Recently, Mukai et al [6][7][8] performed extensive measurements of the densities of several binary liquid Ni-based alloys, and a few representative ternaries, as functions of c and T . The results of their measurements have been used to develop a thorough parameterization for V (c, T ) in superalloys.…”

Section: Introductionmentioning

confidence: 99%

Ab-Initio Molecular Dynamics Simulations of Molten Ni-Based Superalloys (Preprint)

Woodward¹,

Lill²

2011

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Services, Directorate for Information , 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YY)2. REPORT TYPE 3. DATES COVERED (From -To) ABSTRACTIn casting of single-crystal turbine blades for jet engines, the formation of solidification defects has become an increasingly important problem due to the rising levels of refractory elements in Ni-based superalloys. Refractory elements, which are beneficial for high-temperature mechanical properties, enhance density-driven convective instabilities underlying the formation of freckle defects in directional solidification. In support of an effort aimed at the development of validated mathematical criteria for predicting solidification-defect formation in superalloys, ab-initio molecular dynamics simulations have been performed to calculate volumes of Ni-AI, Ni-W, Ni-Re, Ni-Ta, Ni-Al-Re, NiAl-Ta, Ni-Al-W, and complex chemistries approximating RENE-N4 melts. Introduction : In casting of single-crystal turbine blades for jet engines, the formation of solidification defects has become an increasingly important problem due to the rising levels of refractory elements in Ni-based superalloys. Refractory elements, which are beneficial for high-temperature mechanical properties, enhance density-driven convective instabilities underlying the formation of freckle defects in directional solidification. In support of an effort aimed at the development of validated mathematical criteria for predicting solidification-defect formation in superalloys, ab-initio molecular dynamics simulations have been performed to calculate volumes of Ni-Al, Ni-W, Ni-Re, Ni-Ta, Ni-Al-Re, Ni-Al-Ta, Ni-Al-W and complex chemistries approximating RENE-N4 melts. SUBJECT TERMSObjective : Derive physical quantities related to the formation of highly mis-oriented grains during the solidification of single-crystal Ni-based superalloys. During directional solidification, the mass-density difference between the hot liquid near the solid-liquid interface and the cooler melt at the top and side-walls of the casting, is the driving force for convection and associated formation of solidification defects. This mass-density difference originates from both the composition and temperature d...

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Measurement of the Densities of Nickel-Based Ternary, Quaternary and Commercial Alloys

Cited by 21 publications

References 6 publications

Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

Thermophysical properties of some Ni-based superalloys in the liquid state relevant for solidification processing

Prediction of the densities of liquid Ni-based superalloys

Ab-Initio Molecular Dynamics Simulations of Molten Ni-Based Superalloys (Preprint)

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