Effect of long term aging on microstructure and stress rupture properties of a nickel based single crystal superalloy

Effects of Ageing and Forging on Short-term Creep Behaviors of Inconel-713C Superalloy at 850 °C

“…M23C6type carbides were rich in Cr. In some cases, the eutectic phase and MC6-type carbides were formed in Inconel microstructures [16]. However, these phases did not observe in this research.…”

“…Thus, the microstructure of the age-hardened superalloy consisted of the cubical γ' phase, embedded in the γ matrix. As the ageing time increased from 200 to 800 hours, the morphology of the γ' phase changed from the spherical to the cubic shape [16]. Therefore, such changes (the γ' particles size and the volume percent) for 16 hours seemed to be logical.…”

“…Zhao et al [15] showed that the microhardness decreased due to the overgrowth of M23C6-type carbides at grain boundaries, with increasing the ageing time. Shin et.al [16] indicated that with increasing the ageing time, the creep lifetime of Nibased single crystal superalloys reduced. In addition, several studies [1][2][17][18] investigated the microstructure of the as-cast Inconel-713C superalloy; however, few reports dealt with the relation of the heat treatment and the forging process to mechanical properties of the Inconel-713C superalloy.…”

Degradation of nonmodified and rhodium modified aluminide coating deposited on CMSX 4 superalloy

“…A and A). The formation of the TCP phases has been attributed to the super‐saturation of the disordered γ phase by refractory elements (Re, W) (Carroll et al ., ; Shi et al ., ). The structure of the TCP phase is extremely complex and the size of the unit cell is much larger than the lattices of the γ and γ’ phases.…”

A tensorial thermodynamic framework to account for theγ' rafting in nickel-based single crystal superalloys

“…However, recent studies under such high temperature/low stress conditions suggest that the N-type rafting mechanism is deleterious to the non-isothermal creep properties of MC2, CMSX-4 and MCNG alloys (Cormier et al , 2007, Cormier and Cailletaud , 2010b, Giraud et al , 2012, le Graverend et al , 2014a) while a P-type rafting leads to a decrease of the non-isothermal creep strain rate without affecting the creep life compared to a cuboidal microstructure (Giraud et al , 2012). It is also worth mentioning that a coarsened γ ′ microstructure at the beginning of mechanical tests also leads to a decrease in isothermal or non-isothermal creep properties (Shi et al , 2012, Steuer et al , 2014, as well as thermo-mechanical fatigue ones (Kirka et al, 2015). Since such kind of microstructural evolution (i.e.…”