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首页> 外文期刊>Materials Science and Engineering >Improving ductility of Al_(0.74)Mo_(0.26) alloy films through synergy of phase fraction and morphology of nanocrystallites dispersed in amorphous matrix
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Improving ductility of Al_(0.74)Mo_(0.26) alloy films through synergy of phase fraction and morphology of nanocrystallites dispersed in amorphous matrix

机译：通过分散在无定形基质中分散的纳米晶体的相位分数和形态的协同作用，改善Al_（0.74）Mo_（0.26）合金薄膜的延展性

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摘要

Amorphous alloy films exhibit high strength but low ductility, which limits their structural performance applications. Herein, we synthesize dual-phase composite Al_(0.74)Mo_(0.26) alloy films via the introduction of nanocrystallites to amorphous matrix through changing the deposition rate of magnetron sputtering, which can significantly improve the ductility of amorphous alloy film. It has been found that the ductility of composite films are controlled by synergy of phase fraction and morphology of the nanocrystallite, rather than the monotonous increase as a function of nanocrystallite phase fraction. Among them, the composite film composed of a phase fraction with 48% equiaxed-nanocrystallite dispersed in amorphous matrix, displays extremely excellent ductility with critical strain (ε_c) as high as 2.83%, which is approx. 3 times that of amorphous alloy film. Then, the synergy of phase fraction and morphology of nanocrystallite on improving ductility of composite films is discussed systematically from the perspective of crack nucleation and propagation. Furthermore, elastic modulus, hardness and strength of the composite films are also investigated in order to characterize the mechanical properties of composite films, and provide reference for their application.
机译：非晶合金薄膜表现出高强度但低延展性，这限制了它们的结构性能应用。这里，通过改变磁控溅射的沉积速率，通过改变磁控溅射的沉积速率来通过改变纳米晶体来合成双相复合AL_（0.74）莫膜（0.26）合金膜，这可以显着改善非晶合金膜的延展性。已经发现，复合膜的延展性是通过纳米晶体的相位和形态的协同作用来控制的，而不是作为纳米晶体相级分的单调的单调增加来控制。其中，由分散在非晶基质中的48％等轴 - 纳米晶体的相级分组成的复合膜显示出极优异的延展性，其临界应变（ε_c）高达2.83％，这是约2.83％。 3倍的非晶合金薄膜。然后，系统地从裂纹成核和繁殖的角度系统地讨论了纳米晶体相级分和纳米晶体形态的协同作用。此外，还研究了复合膜的弹性模量，硬度和强度，以表征复合膜的机械性能，并为其施用提供参考。

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  • 来源
    《Materials Science and Engineering》 |2021年第2期|140146.1-140146.8|共8页
  • 作者

    Caixia Wang; Tao Wang; Bin Li; Shouming Yu; Linlin Cao; Guojun Zhang;

  • 作者单位

    School of Materials Science & Engineering Xi'an University of Technology Xi an 710048 China;

    School of Materials Science & Engineering Xi'an University of Technology Xi an 710048 China;

    School of Materials Science & Engineering Xi'an University of Technology Xi an 710048 China;

    School of Materials Science & Engineering Xi'an University of Technology Xi an 710048 China;

    School of Mechanical Engineering Harbin Institute of Petroleum Harbin 150028 China;

    School of Materials Science & Engineering Xi'an University of Technology Xi an 710048 China;

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  • 正文语种 eng
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  • 关键词

    Al_(0.74)Mo_(0.26); Alloy film; Ductility; Dual-phase composite; Nanocrystallites; Amorphous; Crack;

    机译：AL_（0.74）MO_（0.26）;合金薄膜;延展性;双相复合材料;纳米晶体;无定形;裂缝;

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