Thermophysical properties of Ni based super alloy 617

Heat capacity of Inconel 617 alloy

“…Figure 1 shows that in the temperature range of ~770-935 K, a phase transformation occurs in the alloy under study, which is accompanied by a jump of cp(T), while a small hysteresis of cp is observed in the heating-cooling cycles. It follows from [4] that this feature is associated with the precipitation of M23C6 carbide, in which the transition onset temperature was ~750 K, and the transition end temperature was ~940 K, which was established based on the DSC heating thermogram. Also in [4], it was revealed the presence of phase transformations occurring in the ranges of ~1053-1230 K and ~1250-1450 K, which relate to the dissolution of the M23C6 and γʹ phases, respectively.…”

“…It follows from [4] that this feature is associated with the precipitation of M23C6 carbide, in which the transition onset temperature was ~750 K, and the transition end temperature was ~940 K, which was established based on the DSC heating thermogram. Also in [4], it was revealed the presence of phase transformations occurring in the ranges of ~1053-1230 K and ~1250-1450 K, which relate to the dissolution of the M23C6 and γʹ phases, respectively. In our case, as can be seen from figure 1, no anomalies were detected in the temperature range of 935-1270 K, and cp(T) dependence has a linear character.…”

“…The thermophysical properties of Inconel 617 alloy at high temperatures decisively depend on the initial microstructure and composition of the alloy, on the thermal stability of various precipitates that are formed during alloy production, and operating conditions. In [4], devoted to the study of the thermophysical properties of the Inconel 617 alloy, based on the data of X-ray diffraction analysis (XRD), the presence of four different phases in the alloy was confirmed, namely solid solution γ (FCC, face-centered cubic lattice), ordered phase Ni3(Al, Ti) known as γʹ phase (FCC), and also carbides of the types of MC {(Nb, Ti)C} and M23C6 (M = Cr, Fe, Mo). Figure 1 shows that in the temperature range of ~770-935 K, a phase transformation occurs in the alloy under study, which is accompanied by a jump of cp(T), while a small hysteresis of cp is observed in the heating-cooling cycles.…”

“…To date, the thermophysical properties of Inconel 617 alloy, in particular, the heat capacity, have been studied in a limited number of works. The heat capacity investigation of Inconel 617 was carried out only in works [1][2][3][4], however, measurements were performed by the authors of these articles on samples previously subjected to water quenching [1], annealing at high temperatures [1,3,4] including in air [2], thermal fatigue testing [2], and aging treatment [3]. However, the thermophysical and thermomechanical properties of alloys at high temperatures decisively depend on the initial microstructure and composition of the alloy, on the thermal stability of various precipitated phases that are formed during alloy production and operating conditions.…”

Effect of Si content on the cracking behavior of selective laser melted Al7050

“…A multi-platform software program called Jmatpro was used to investigate the phase equilibrium of the 1# samples (Ai et al, 2015(Ai et al, , 2017Rai et al, 2017). It can be seen that Al 7 Cu 2 Mg with low melting point (approximately 510°C) is the main liquid phases in the molten pool (Figure 2c).…”