A concurrent high strength and ductility of 3D gyroidal nanoporous metallic glasses

Li Jiejie; Hu Xiaodan; Zhang Yuhang; Tian Chenyao; Hu Guoming; Liu Sheng; Xia Re

首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >A concurrent high strength and ductility of 3D gyroidal nanoporous metallic glasses

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A concurrent high strength and ductility of 3D gyroidal nanoporous metallic glasses

机译：3D陀尼式纳米多孔金属眼镜的同时高强度和延展性

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By using molecular dynamics simulations, we investigate the tensile response of nanopomus (NP) Cu50Zr50 metallic glasses (MGs) with 3D gyroidal structure. Similar to nanopomus crystalline metals, NP-MGs fail by the plastic necking of ligaments, but shear bandings (SBs) prevail in those thick-ligament specimens. Particularly, with ligament diameter decreasing to 2.34 nm, SBs are hardly observed due to the limit of translation from shear transformation zones, resulting in superior strength and ductility of NP-MGs. The critical ligament size to suppress the formation of SBs is much smaller than those calculated value in MGs. The observations reveal a design strategy that a concurrent high strength and ductility of MGs could be obtained by designing 3D nanoporous structure with supra-nano size. The scaling laws for Young's modulus and strength as functions of relative density and ligament diameters are addressed, consistent with those in nanoporous crystalline materials.

机译：通过分子动力学模拟，我们研究了具有三维回旋结构的纳米pomus（NP）Cu50Zr50金属玻璃（MGs）的拉伸响应。与纳米多晶金属类似，NP-MG因韧带的塑性颈缩而失效，但在厚韧带标本中剪切带（SBs）占主导地位。特别是，当韧带直径减小到2.34 nm时，由于剪切转变区的平移限制，几乎无法观察到SBs，因此NP-MGs具有优越的强度和延展性。抑制SBs形成的临界韧带尺寸远小于MGs中的计算值。观察结果揭示了一种设计策略，即通过设计具有超纳米尺寸的三维纳米多孔结构，可以同时获得MGs的高强度和高延展性。讨论了杨氏模量和强度随相对密度和韧带直径变化的标度律，与纳米多孔晶体材料中的标度律一致。

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《Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites》 |2021年第1期|共9页
作者
Li Jiejie; Hu Xiaodan; Zhang Yuhang; Tian Chenyao; Hu Guoming; Liu Sheng; Xia Re;
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作者单位

Wuhan Univ Minist Educ Key Lab Hydraul Machinery Transients Wuhan 430072 Peoples R China;

Wuhan Univ Minist Educ Key Lab Hydraul Machinery Transients Wuhan 430072 Peoples R China;

Wuhan Univ Minist Educ Key Lab Hydraul Machinery Transients Wuhan 430072 Peoples R China;

Wuhan Univ Minist Educ Key Lab Hydraul Machinery Transients Wuhan 430072 Peoples R China;

Wuhan Univ Minist Educ Key Lab Hydraul Machinery Transients Wuhan 430072 Peoples R China;

Wuhan Univ Inst Technol Sci Wuhan 430072 Peoples R China;

Wuhan Univ Minist Educ Key Lab Hydraul Machinery Transients Wuhan 430072 Peoples R China;

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正文语种 eng
中图分类非晶态和类晶态;
关键词
Nanoporous metallic glasses; Molecular dynamics; 3D gyroidal structure; Ductility; Shear banding;

机译：纳米多孔金属眼镜;分子动力学;3D陀螺结构;延展性;剪切绷带;

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A concurrent high strength and ductility of 3D gyroidal nanoporous metallic glasses

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