• Title/Summary/Keyword: 텅스텐 중합금

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Study on the Improving Penetration Performance of Tungsten Heavy Alloy Penetrator by Heat Treatment (열처리 공정을 통한 텅스텐 중합금 관통자의 관통능력 향상에 관한 연구)

  • Kim, Myunghyun;Noh, Jooyoung;Lee, Youngwoo;An, Daehee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.2
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    • pp.322-327
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    • 2020

  • An Armor Piercing Fin Stabilized Discarding Sabot (APFSDS), which penetrates and sabotages the target by physical energy, consists of a general penetrator using Depleted Uranium (DU) or Tungsten Heavy Alloy (THA) but THA is preferable because of manufacturing and environmental issues. On a THA penetrator, the penetration performance is determined mainly by self-sharpening depending on the hardness and toughness of materials. In particular, the tensile strength and impact strength work as key factors. The correlation coefficient for the penetration performance of the tensile strength was 0.721 and the impact strength was -0.599. The improved penetration performance by additional heat treatment was proven experimentally. Therefore, maintaining elongation over 9 % and tensile strength over 123 kg/㎟ is desirable, and the impact strength should be less than 6.8 kg·m/㎠ for good penetration performance.

  • https://doi.org/10.5762/KAIS.2020.21.2.322 인용 PDF KSCI

A Study of Localization for Adiabatic Shear Band in WHA(Tungsten Heavy Alloy) (텅스텐 중합금의 단열전단밴드 형성 및 국부화에 대한 연구)

  • Hwang, Doo-Son;Hong, Sung-In
    • Journal of the Korean Society of Propulsion Engineers
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    • v.11 no.6
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    • pp.18-25
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    • 2007

  • In a plastic metal forming of thermally rate-sensitive material, the localized shear band stems from evolution of a narrow region in which intensive plastic flow occurs. And it give rise to fatal fracture with plastic instability. The objectives of this study are to investigate the localization behavior by using numerical method and predict the failure for WHA(Tungsten Heavy Alloy). In this work, the implicit finite difference scheme is used because of the advantage about convergence and the numerical stability. This study is based on an analysed material with hardening as well as thermally softening behavior which includes isotropic strain hardening and observed the extension of localization within shear band according to material properties.

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