Thermophysical properties of solid and liquidInconel 718 Alloy*

Pottlacher, Gernot; Hosaeus, Herwig; Kaschnitz, Erhard; Seifter, Achim

doi:10.1034/j.1600-0692.2002.310301.x

Cited by 101 publications

(44 citation statements)

References 15 publications

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“…In particular Inconel 718 was chosen. This material is a heat-resistant Ni-Fe alloy, which is hardened by precipitation of secondary phases into the metal matrix [25], achieving in this case an average value of hardness 42 HRC, with strain hardening affected areas on several surface points due to the initial saw cuts. The chemical composition, mechanical, and physical properties of tested materials are shown in Table 1.…”

Section: Experimental Setup and Tests Performancementioning

confidence: 99%

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

González

Calleja

Pereira

et al. 2018

Metals

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Manufacturing techniques that are applied to turbomachinery components represent a challenge in the aeronautic sector. These components require high resistant super-alloys in order to satisfy the extreme working conditions they have to support during their useful life. Besides, in the particular case of Integrally Bladed Rotors (IBR), usually present complex geometries that need to be roughed and finished by milling and grinding processes, respectively. In order to improve their manufacturing processes, Super Abrasive Machining (SAM) is presented as a solution because it combines the advantages of the use of grinding tools with milling feed rates. However, this innovative technique usually needed high tool rotary speed and pure cutting oils cooling. These issues implied that SAM technique was not feasible in conventional machining centers. In this work, these matters were tackled and the possibility of using SAM in these five-axis centers with emulsion coolants was achieved. To verify this approach, Inconel 718 single blades with non-ruled surfaces were manufactured with Flank-SAM technique and conventional milling process, analyzing cutting forces, surface roughness, and dimension accuracy in both cases. The results show that SAM implies a suitable, controllable, and predictable process to improve the manufacture of aeronautical critical components, such as IBR.

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Section: Experimental Setup and Tests Performancementioning

confidence: 99%

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

González

Calleja

Pereira

et al. 2018

Metals

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“…Electrical resistivity data have been reported for CMSX 4 and Nimonic 901 (300-1 470 K), 13) Inconel 625 (320-1 270 K), 10) IN 718 (300-900 K), 9,14) (300-1 200 K) 15) and (920-2 000 K), 9) (340-1 300 K), 7) Nimonic 75, 80, 90, 95, 100 and 105 (320-1 070 K), 16) Hastelloy X (320-1 470 K), 11) Nimonic 75 and IN 600 (300-1 070 K), 4) Inconel and Inconel X.…”

Section: Databasementioning

confidence: 99%

The Effect of Aluminium Content on Thermophysical Properties of Ni-based Superalloys

Mills

Youssef

2006

ISIJ Int.

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Ni 3 Al is the principal component in the gЈ phase formed in Ni-based superalloys but Ni 3 Cr and Ni 3 Fe can also contribute to the gЈ phase at temperatures below 820 K. Approximate values for the gЈ phase content can be derived from a relationship based on (mass% Al). In a previous publication it was shown that the density in both the solid and liquid alloys was dependent upon the gЈ phase (or Al) contents in the alloy. Consequently, the effect of the gЈ phase on other thermophysical properties (C p , enthalpy, electrical resistivity, thermal conductivity and diffusivity) have been investigated. Linear relations were found between the property values around 300 K and the mass% Al. It was also found that property-temperature relationships were also affected by the gЈ phase (or Al) contents. Although it is known that the strong bonding between Ni and Al atoms affects the density of liquid alloys, we were unable to establish any such relationship for the other properties for liquid alloys because of the large experimental uncertainties in the measurements of these properties. This study has revealed that there is an urgent need for accurate values for C p , electrical resistivity, thermal diffusivity and conductivity for liquid, Ni-based superalloys.KEY WORDS: Ni-based superalloys; gЈ phase; heat capacity; enthalpy; electrical resistivity; thermal conductivity; thermal diffusivity. structural factors in the alloy when compared with other properties. Consequently, it would be expected that other properties may be affected by the gЈ phase content. In this paper we examine the effect of gЈ phase (via the Al content) on other thermophysical properties for solid and liquid Ni-based superalloys. Database and Treatment of DataThermophysical property data have been reported for a number of Ni-based superalloys; the chemical compositions for these alloys are given in Table 1.In this paper all temperatures are expressed as thermody- 3. Thermal Expansion Coefficient (a a ) and Density (r r )The density and the linear thermal expansion coefficient (a) were found to be functions of the gЈ phase content (or Al content).3) The difference in density, Dr 296 ϭr 298 meas Ϫ r 298 ideal , was found to increase with increasing gЈ phase and/or Al contents, (Eqs. (4) and (5), respectively). The thermal expansion coefficients for solid alloys were found to decrease with increasing gЈ phase or Al content as can be seen from Fig. 2. Thermal expansion data were collated and divided into three groups based on the Al content, namely, (0-0.5 mass%), (3-4 mass%) and (5-5.8 mass%). Vol. 46 (2006) The mean values for each group were determined and are shown in Fig. 2. It can also be seen from this figure that the slope of all three curves flatten around 870 K and that the coarsening and dissolution of the gЈ phase is accompanied by an increase in slope for the alloys with high gЈ content (CMSX 4 and Rene 80). Heat Capacity (C p ) and Enthalpy (H T ؊H 298 )The enthalpy and C p are not particularly sensitive to structure and consequently, Kopp's...

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“…Therefore a Scheil-Gulliver based approach has been chosen to calculate the liquid fraction in dependence of temperature. In this manner solidus temperature is reached at 1 338 K, which is rather low compared to Pottlacher et al, 12) but should be appropriate due to micro segregation phenomena. The liquid fraction with respect to temperature is presented in Fig.…”

Section: Mushy Regionmentioning

confidence: 99%

“…Furthermore the magnetic vector potential is being introduced in Eq. (12). By definition its curl equals the magnetic flux.…”

Section: Electromagneticsmentioning

confidence: 99%

Coupling of Multiple Numerical Models to Simulate Electroslag Remelting Process for Alloy 718

et al. 2015

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Thermophysical properties of solid and liquidInconel 718 Alloy*

Cited by 101 publications

References 15 publications

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

Super Abrasive Machining of Integral Rotary Components Using Grinding Flank Tools

The Effect of Aluminium Content on Thermophysical Properties of Ni-based Superalloys

Coupling of Multiple Numerical Models to Simulate Electroslag Remelting Process for Alloy 718

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