[Download]Name: Li J F , Sun Y H , Ding D W , et al. Nanosecond-pulsed laser welding of metallic glass[J]. 2020, 537.

Class: 2020

Content:
This study explores nanosecond-pulsed (ns-pulsed) laser welding on the metallic glass (MG) ribbons of four
compositions: Fe78Si9B13, Z r65Cu15Ni10Al10, L a55Ni20Al25and Ce65Al10Cu20Co5. All MGs can be welded in the air
by the ns-pulsed laser, and the crystallization of the welding joints can be avoided by proper control of the laser
parameters. By varying the travel speed, pulse duration and repetition frequency, the critical crystallization time
of MG can be quickly detected in a high-throughput way by ns-pulsed laser welding. At the optimal processing
conditions, 70–90% of the tensile strength of the parent melt-spun ribbon can be preserved in the welded MG
ribbons. The mechanical strength is well linked to the profile of the welding joint, which suggests a simple
method to evaluate the welding quality. A welding parameter map has been established based on the experi-
ments, and it is concluded that the laser power-density per sample thickness and the interaction time are the key
factors that control the crystallization and strength of the welding joints. The map is valid for a broad range of
MG compositions of all sample thickness, and thus the optimal processing conditions may be extended to all MGs
with equivalent glass-forming ability.