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

Influence of withdrawal rate on last stage solidification path of a Mo-rich Ni3Al based single crystal superalloy

“…With increasing withdrawal rate, the degree of microsegregation initially increased and then decreased, which agrees with previous research results based on high temperature gradient (G) directional solidification [30,31]. This evolution was caused by the solute back diffusion during solidification: with increasing withdrawal rate, the degree of microsegregation depends on the competitive relation between the decrease in diffusion distance (about k 1 /2, where k 1 is primary dendritic arm spacing and k 1 / V À0.25 ) and diffusion time (DT/GV, where DT is solidification range) [30][31][32]. The influence of diffusion time was greater at lower withdrawal rate region, while at higher withdrawal rate region, the influence of diffusion distance was more significant.…”

Effect of solidification parameters on the secondary dendrite arm spacing in MAR M-247 superalloy determined by a novel approach

“…Similar results were also reported in the earlier works [1,[5][6][7][8][16][17][18][19][20]. The trendline equation:…”

Primary α phase and its effect on the impact ductility of a high Cr content cast Ni-base superalloy

“…The Ni-base superalloys have been widely used for producing crucial parts of gas turbine engines for over 50 years, thereby having been drawing extensive research over many various fields of study [1][2][3][4][5][6][7][8][9][10][11]. Chromium commonly exists in nickel-based superalloys due to the protective effects of Cr against hot corrosion and high temperature oxidation.…”