Evolution of microstructure in Zr55Cu30Al10Ni5 bulk amorphous alloy by high power pulsed Nd:YAG laser

Microstructural analysis of Zr55Cu30Al10Ni5 bulk metallic glasses by laser surface remelting and laser solid forming

“…This difference in the microhardnesses may be due to the different volume fractions of crystallization phases distributed in the deposited layers. In general, the BMGs with a certain distribution of crystallization phases in the deposit exhibit higher strength and hardness than the corresponding single-phase BMGs [19], and the composited precipitation of the nanocrystals and the microscale dendrite should exhibit a better reinforcement effect than the precipitation of only nanocrystals. In addition, the microhardness in the Cu 10 Zr 7 -type dendrite þ NiZr 2 -type nanocrystal zone decreases with the laser heat input.…”

Effect of the remelting scanning speed on the amorphous forming ability of Ni-based alloy using laser cladding plus a laser remelting process

“…However, the amorphous structure is not obtained at scanning speeds of 4 m/min and 5 m/min; this lack of amorphous phase is because the effects of non-uniform melting and heterogeneous nucleation cannot be ignored in the laser cladding plus laser remelting process [16,20]. From the previous studies, it was established that the heat affected zone (HAZ) of BMGs or amorphous coating is liable to crystallize more easily than the laser remelted region [5,6,15,[25][26][27][28][29][30]. Crystallization in the HAZ is a solid-state reaction; it depends on the heating and cooling retention time in the crystallization temperature range of the thermal cycle.…”

Laser Micro-processing of Zr50Cu28Ni7Co15 High-Temperature Shape Memory Alloys

“…A few of these studies are related to CuZr-based metallic glasses (Ref [12][13][14]; however, no information on CuZr-based SMAs is available. Aqida et al (Ref 12) reported a study on the engraving of amorphous and crystalline CuZrAl alloys to improve the wear resistance and directing fluid flow in micromolding.…”