首页> 外文期刊>Materials Science and Engineering >Dynamic mechanical behavior of 93W-4.9Ni-2.lFe/ 95W-2.8Ni-1.2Fe-1Al_2O_3 heavy alloy composite
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Dynamic mechanical behavior of 93W-4.9Ni-2.lFe/ 95W-2.8Ni-1.2Fe-1Al_2O_3 heavy alloy composite

机译:93W-4.9Ni-2.lFe / 95W-2.8Ni-1.2Fe-1Al_2O_3重合金复合材料的动态力学行为

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摘要

93W–4.9Ni–2.1Fe/95W–2.8Ni–1.2Fe–1Al2O3(93WHA/95WHA) composites were fabricated by powder metallurgical routes to meet the demands pertaining to both the penetration and fragmentation performances. Mechanical behavior, adiabatic shear band (ASB) formation and fracture characteristics of the 93WHA/95WHA composites at high strain rate were evaluated using split Hopkinson bars. The relation between composition, microstructure and dynamic mechanical properties was investigated. The dynamic compression and tensile behavior of the 93WHA/95WHA composite are dependent on the 93WHA part and 95WHA part, respectively. The 93WHA part in the 93WHA/95WHA composite is more easily to form narrow and deep ASBs than the 95WHA part, showing excellent penetration performance. Brittle fracture occurs in the 95WHA part of the 93WHA/95WHA composite by W–W grain boundary separation and matrix rupture under dynamic tensile loading because of high W–W contiguity, residual porosity and addition of Al2O3particles in the 95WHA part, providing conceivable fragmentation performance and secondary destruction.
机译:通过粉末冶金路线制造了93W–4.9Ni–2.1Fe / 95W–2.8Ni–1.2Fe-1Al2O3(93WHA / 95WHA)复合材料,以满足有关渗透和破碎性能的要求。使用劈开的霍普金森棒评估了93WHA / 95WHA复合材料在高应变速率下的力学行为,绝热剪切带(ASB)的形成和断裂特性。研究了成分,微观结构与动态力学性能之间的关系。 93WHA / 95WHA复合材料的动态压缩和拉伸行为分别取决于93WHA部分和95WHA部分。 93WHA / 95WHA复合材料中的93WHA零件比95WHA零件更容易形成窄而深的ASB,显示出出色的渗透性能。在93WHA / 95WHA复合材料的95WHA部分中,由于W-W连续性,残余孔隙率和在95WHA部分中添加Al2O3颗粒而导致的动态连续载荷下,W-W晶界分离和基体破裂在动态拉伸载荷下发生脆性断裂。和二次破坏。

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  • 来源
    《Materials Science and Engineering》 |2018年第27期|349-356|共8页
  • 作者单位

    National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology,National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals, Guangdong Institute of Materials and Processing;

    National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology;

    National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology;

    National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology;

    National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology;

    National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals, Guangdong Institute of Materials and Processing;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Tungsten heavy alloy composite; Dynamic mechanical properties; Adiabatic shear band; Fracture mode;

    机译:钨重合金复合材料;动态力学性能;绝热剪切带;断裂模式;

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