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<p>Manufacturing constraints related to critical size and room temperature brittleness represent significant challenges for the application of amorphous materials. The successful fabrication of bulk metallic glass composite (BMGC) holds promise for mitigating these limitations. In this study, <i>X</i> vol.% Nb<sub>p</sub>/Vit1 (<i>X</i>=0,1,5,10) BMGCs were fabricated using laser powder bed fusion (L-PBF). The influence of varying Nb contents on the microstructure and mechanical properties of the composites were investigated. The results showed that the <i>X</i> vol.% Nb<sub>p</sub>/Vit1 (<i>X</i>=0,1,5,10) BMGCs prepared by L-PBF exhibited a high amorphous structure (&gt;90.64%). However, when the Nb content reached <i>X</i>=10, the amorphous content sharply decreased to 77.24%. Notably, Nb particles could inhibit the crystallization of the surrounding amorphous phases. Room temperature compression testing indicated that Vit1 BMG exhibited brittle fracture with a fracture strain of 3.29%. Conversely, the other three types of Nb<sub>p</sub>/Vit1 BMGCs showed varying degrees of plasticity enhancement and also displayed a progressive fracture behavior distinct from typical brittle fracture during compression. Notably, the maximum fracture strain of 10% Nb<sub>p</sub>/Vit1 BMGC reached 5.78%.</p>

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Microstructure and Mechanical Properties of Nb-Reinforced Bulk Metallic Glass Composites Prepared by Laser Powder Bed Fusion

  • 期刊论文

  • 发表日期：

    2025年1月1日

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  • Y. Q. Ge,
  • Y. Yin,
  • Z. X. Chang,
  • H. J. Xu,
  • W. H. Bi

摘要

Manufacturing constraints related to critical size and room temperature brittleness represent significant challenges for the application of amorphous materials. The successful fabrication of bulk metallic glass composite (BMGC) holds promise for mitigating these limitations. In this study, X vol.% Nbp/Vit1 (X=0,1,5,10) BMGCs were fabricated using laser powder bed fusion (L-PBF). The influence of varying Nb contents on the microstructure and mechanical properties of the composites were investigated. The results showed that the X vol.% Nbp/Vit1 (X=0,1,5,10) BMGCs prepared by L-PBF exhibited a high amorphous structure (>90.64%). However, when the Nb content reached X=10, the amorphous content sharply decreased to 77.24%. Notably, Nb particles could inhibit the crystallization of the surrounding amorphous phases. Room temperature compression testing indicated that Vit1 BMG exhibited brittle fracture with a fracture strain of 3.29%. Conversely, the other three types of Nbp/Vit1 BMGCs showed varying degrees of plasticity enhancement and also displayed a progressive fracture behavior distinct from typical brittle fracture during compression. Notably, the maximum fracture strain of 10% Nbp/Vit1 BMGC reached 5.78%.