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Bulk amorphous Fe–Cr–Mo–C–B–Y alloys were prepared by copper mold suction casting. The structure, fracture morphology, crystallization characteristics, hardness, and fracture toughness of these alloys were studied using XRD, SEM, DSC, hardness, and indentation tests. The thermal analysis curves provided the glass transition temperature (Tg), crystallization onset temperature (Tx), and crystallization peak temperature (Tp), indicating significant kinetic effects. Using the Kissinger method, the activation energy (E) for glass transition, crystallization, and overall activation energy under different heating rates were calculated, showing high thermal stability. Mechanical test results showed a hardness of 1178 kg/mm2 and a fracture toughness of 7.614 MPa m1/2, indicating typical brittle fracture. Observations of the fracture morphology revealed that the bulk amorphous alloy exhibited shear fracture mode.

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Study on the Crystallization Behavior and Mechanical Properties of Bulk Fe43Cr16Mo16C18B5Y2 Amorphous Alloys

  • 章节

  • 发表日期：

    2025年

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  • Q. J. Chen,
  • D. D. Wei,
  • X. L. Zhou,
  • X. Z. Hua,
  • J. Y. Zhang,
  • Y. L. Ai

摘要

Bulk amorphous Fe–Cr–Mo–C–B–Y alloys were prepared by copper mold suction casting. The structure, fracture morphology, crystallization characteristics, hardness, and fracture toughness of these alloys were studied using XRD, SEM, DSC, hardness, and indentation tests. The thermal analysis curves provided the glass transition temperature (Tg), crystallization onset temperature (Tx), and crystallization peak temperature (Tp), indicating significant kinetic effects. Using the Kissinger method, the activation energy (E) for glass transition, crystallization, and overall activation energy under different heating rates were calculated, showing high thermal stability. Mechanical test results showed a hardness of 1178 kg/mm2 and a fracture toughness of 7.614 MPa m1/2, indicating typical brittle fracture. Observations of the fracture morphology revealed that the bulk amorphous alloy exhibited shear fracture mode.