Microstructure evolution of directionally solidified DZ125 superalloy with melt superheating treatment

Influence of withdrawal rate on the microstructure of Ni-base single-crystal superalloys containing Re and Ru

“…It has been proved to be an efficient way to suppress the grain defects formation by increasing the thermal gradient during directional solidification. Therefore, many new technologies, such as gas cooling casting (GCC) [9], fluidized-bed quenching (FBQ) [10], and liquid metal cooling (LMC) [11,12] processes have been developed to increase the thermal gradient during solidification. The thermal gradient of LMC process is 2-4 times greater than that of HRS method, which results in the reduction of dendrite arm spacing and segregation of alloying elements.…”

The local structure of molten Ni 1−x Al x : An ab initio molecular dynamics study

“…Making clear the nature of molten structure is essential for the understanding and subsequent controlling of the solidification process. Although some methods such as superheating treatment have been found to be effective in influencing the solidification structure of Ni-based superalloy [1][2][3][4][5] and its nucleation undercooling [2,3], the understanding of the molten structure itself remains to be very challenging because Ni-based superalloy is a complex multicomponent system. Some efforts have been devoted to exploring the molten structure of Ni-based superalloy.…”

Precipitation behavior of μ phase and creep rupture in single crystal superalloy CMSX-4

“…The nickel-base superalloys are applied in the crucial parts of aero-gas turbine engines, thereby having been drawing extensive research over many various fields of study [1][2][3][4][5][6]. These alloys can operate for thousands of hours at temperatures as high as 1100 • C due to in particular their high temperature creep resistance [6].…”