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Origin of large plasticity and multiscale effects in iron-based metallic glasses

Author

Listed:
  • Baran Sarac

    (Austrian Academy of Sciences)

  • Yurii P. Ivanov

    (Austrian Academy of Sciences
    Far Eastern Federal University)

  • Andrey Chuvilin

    (CIC nanoGUNE Consolider
    Basque Foundation for Science)

  • Thomas Schöberl

    (Austrian Academy of Sciences)

  • Mihai Stoica

    (ETH Zurich
    Politehnica University of Timisoara)

  • Zaoli Zhang

    (Austrian Academy of Sciences)

  • Jürgen Eckert

    (Austrian Academy of Sciences
    Montanuniversität Leoben)

Abstract

The large plasticity observed in newly developed monolithic bulk metallic glasses under quasi-static compression raises a question about the contribution of atomic scale effects. Here, nanocrystals on the order of 1–1.5 nm in size are observed within an Fe-based bulk metallic glass using aberration-corrected high-resolution transmission electron microscopy (HRTEM). The accumulation of nanocrystals is linked to the presence of hard and soft zones, which is connected to the micro-scale hardness and elastic modulus confirmed by nanoindentation. Furthermore, we performed systematic simulations of HRTEM images at varying sample thicknesses, and established a theoretical model for the estimation of the shear transformation zone size. The findings suggest that the main mechanism behind the formation of softer regions are the homogenously dispersed nanocrystals, which are responsible for the start and stop mechanism of shear transformation zones and hence, play a key role in the enhancement of mechanical properties.

Suggested Citation

  • Baran Sarac & Yurii P. Ivanov & Andrey Chuvilin & Thomas Schöberl & Mihai Stoica & Zaoli Zhang & Jürgen Eckert, 2018. "Origin of large plasticity and multiscale effects in iron-based metallic glasses," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03744-5
    DOI: 10.1038/s41467-018-03744-5
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    Cited by:

    1. Xingjia He & Yu Zhang & Xinlei Gu & Jiangwei Wang & Jinlei Qi & Jun Hao & Longpeng Wang & Hao Huang & Mao Wen & Kan Zhang & Weitao Zheng, 2023. "Pt-induced atomic-level tailoring towards paracrystalline high-entropy alloy," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    2. Liliang Shao & Qiang Luo & Mingjie Zhang & Lin Xue & Jingxian Cui & Qianzi Yang & Haibo Ke & Yao Zhang & Baolong Shen & Weihua Wang, 2024. "Dual-phase nano-glass-hydrides overcome the strength-ductility trade-off and magnetocaloric bottlenecks of rare earth based amorphous alloys," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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