Structures, faults, and the rod-plate transition in eutectics

1300 K Compressive Properties of Directionally Solidified Ni-33Al-33Cr-1Mo

“…1 (b) is also in agreement with that for NiAI-32.4Cr-lMo grown at 12.7 mm/h by Cline, et a!. [8] utilizing a Bridgeman technique. On the other hand Yang et a!.…”

Microstructure and mechanical properties of rapidly solidified NiAl–Cr(Mo) eutectic alloy doped with trace Dy

“…2. The result reveals that the Dy rich phase can be determined as Ni 5 Dy, which has a hexagonal crystal structure with a = 0.4856 nm, c = 0.3969 nm and the space group of P6/mmm. TEM observation on the IC alloy finds that there are abundant interface dislocation networks along the NiAl and Cr(Mo) phase boundaries, as shown in Fig.…”

“…However, limited room temperature (RT) ductility and toughness as well as poor elevated temperature strength seriously hinder its commercial application [1][2][3]. The previous researches show that the addition of refractory metals like V, Mo, Cr and Re can improve its RT toughness and elevated temperature strength by directional solidification of its quasi-binary or ternary eutectic systems [3][4][5]. Among all the NiAlbased eutectic alloys, Ni-33Al-28Cr-6Mo (NiAl-Cr(Mo) for short) eutectic alloy had been regarded as one of the most reasonable choice, because of a relatively good combination between elevated temperature strength, melting point and RT toughness [6].…”

Effect of withdrawal rate on the microstructure of directionally solidified NiAl–Cr(Mo) hypereutectic alloy

“…In contrast to binary NiAl alloy, the toughness and strength of NiAleCr alloy were enhanced markedly. What's more, Cline et al [15,16] found that substitution of Cr with Mo led to a change of microstructure from Cr fibers to Cr(Mo) lamellae when the Mo content exceeded 0.6%(at.%). Directionally solidified NiAleCr(Mo) alloy, where the lamellae were ideally parallel to the growth direction, could combine the properties of high roomtemperature fracture toughness and elevated-temperature creep strength.…”