Effect of minor alloying additions on the carbide morphology in a single crystal Ni-base superalloy

Effect of boron addition on the microstructure and stress-rupture properties of directionally solidified superalloys

“…Boron, as a strong negative segregation element, usually diffuses into the remaining melt during the initial solidification of the alloy. Consequently, a boron rich layer is formed at the frontier of the solid-liquid interface, which tends to enhance the undercooling degree of the solid-liquid interface and liquid [4,11]. As a result, the formation of γ′/γ eutectics is favored in the alloy with increasing boron content.…”

The influence of carbon addition on carbide characteristics and mechanical properties of CM-681LC superalloy using fine-grain process

“…Further, the particles size and aspect ratio of MC carbides at GBs of 11C and 15C are also similar. It demonstrates that the lower pouring temperature in the fine-grain process reduces the temperature gradient and shortens the solidification time, limiting carbide growth [14].…”

Effect of Solidification Condition and Carbon Content on the Morphology of MC Carbide in Directionally Solidified Nickel-base Superalloys

“…The carbon content also affected the carbide morphology, i.e., increasing the carbon content induced the transformation from blocky carbides to script-like carbides [8,17e19] . In addition, the morphology of MC carbides in the alloys containing higher amounts of hafnium was more prone to be blocky [17,20] . However, most of the characterizations of the carbides morphology were two-dimensional.…”