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High-Strain Rate Tensile Behavior of Pure Aluminum Single and Multi-Crystalline Materials with a Tensile Split Hopkinson Bar

인장형 홉킨슨 바 장치를 이용한 알루미늄 단결정 및 멀티결정재의 동적 실험

  • Received : 2015.06.22
  • Accepted : 2015.11.06
  • Published : 2016.01.01

Abstract

In this study, we modified the conventional tensile split Hopkinson bar(TSHB) apparatus typically used for the high strength steel to evaluate the tensile deformation behavior of soft metallic sheet materials under high strain rates. Stress-strain curves of high purity single and multi-crystalline materials were obtained using this experimental procedure. Grain morphology and initial crystallographic orientation were characterized by EBSD(Electron Backscattered Diffraction) method measured in a FE-SEM(Field emission-scanning electron microscopy). The fractured surfaces were observed by using optical microscopy. The relationship between plastic deformation of aluminum crystalline materials under high-strain rates and the initial microstructure and the crystallographic orientations has been addressed.

Keywords

TSHB(Tensile Split Hopkinson Bar);EBSD(Electron Backscattered Diffraction);DIC(Digital Image Correlation);Single Crystal;Multicrystal;Crystallographic Orientation

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