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Multidimensional Study on Spall Behavior of High-Purity Copper Under Sliding Detonation

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Abstract

The spall behaviors of high-purity copper samples with different heat treatment histories were investigated using optical microscopy and X-ray computer tomography (XRCT). The spall samples were obtained by sliding detonation experiments at low pressures (2 to 4 GPa). It was found that the spall planes created by sliding detonation in this experiment are similar to the spall planes created by plate impact test, except for more secondary damage residual around the main spall plane. The results of damage degree, the shape, and the distributions of voids obtained by the means of metallography (2D) and XRCT (3D) statistics were consistent. For similar microstructure, the maximum damage degree and damage zone width increase with increasing shock stress. Whereas the ranges of voids distribution parallel to the shock stress direction decreases with the increasing of shock stress. For the shock stress is similar, the shape of voids in annealed samples are closed to spheres, their mean flatness is 0.51. The voids in samples with thermo-mechanical treatment histories are sheet like with mean flatness 0.16. The difference in grain size (40 and 9 μm) may be the main reason of such difference.

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Acknowledgments

This work was supported by the NSAF (No. U1330126), National Natural Science Foundation of China (No. 51274245), the PhD. Programs Foundation of Ministry of Education of China (No. 20120162130006), the Hunan Provincial Natural Science Foundation of China (No. 14JJ2011), and the Key Project of State Key Laboratory of Explosion Science and Technology (No. KFJJ11-1), Independent Exploration Innovate Foundation of Central South University (2013zzts186), Undergraduate Innovation Training Program of Central South University (CL14009).

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Authors and Affiliations

  1. School of Material Science and Engineering, Central South University, Changsha, 410083, China

    Yang Yang (Professor), Zhiqiang Peng (Master) & Shuhong Luo (Master)

  2. Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 621900, China

    Yang Yang (Professor), Zhaoliang Guo (Researcher), Tiegang Tang (Researcher) & Haibo Hu (Researcher)

  3. National Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China

    Yang Yang (Professor) & Qingming Zhang (Researcher)

  4. Key Laboratory of Nonferrous Metals Material Science and Engineering of Ministry of Education, Central South University, Changsha, 410083, China

    Yang Yang (Professor)

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  1. Yang Yang
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  2. Zhiqiang Peng
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  3. Zhaoliang Guo
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  4. Shuhong Luo
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Correspondence to Zhiqiang Peng.

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Manuscript submitted February 23, 2015.

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Yang, Y., Peng, Z., Guo, Z. et al. Multidimensional Study on Spall Behavior of High-Purity Copper Under Sliding Detonation. Metall Mater Trans A 46, 4070–4077 (2015). https://doi.org/10.1007/s11661-015-3027-9

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