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Dynamic compressive behaviour of Ti-6Al-4V alloy processed by electron beam melting under high strain rate loading

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Abstract

This paper documents an investigation into the compressive deformation behaviour of electron beam melting (EBM) processing titanium alloy (Ti-6Al-4V) parts under high strain loading conditions. The dynamic compression tests were carried out at a high strain rate of over 1×103/s using the split Hopkinson pressure bar (SHPB) test system and for comparison the quasi-static tests were performed at a low strain rate of 1×10−3/s using a numerically controlled hydraulic materials test system (MTS) testing machine at an ambient temperature. Furthermore, microstructure analysis was carried out to study the failure mechanisms on the deformed samples. The Vickers micro-hardness values of the samples were measured before and after the compression tests. The microstructures of the compressed samples were also characterized using optical microscopy. The particle size distribution and chemical composition of powder material, which might affect the mechanical properties of the specimens, were investigated. In addition, the numerical simulation using commercial explicit finite element software was employed to verify the experimental results from SHPB test system.

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Acknowledgments

The authors would like to acknowledge Victorian Direct Manufacturing Centre (VDMC), Camplex Pty Ltd for their financial support to this project and also the Titanium Technologies Theme of the Future Manufacturing Flagship within CSIRO.

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Authors and Affiliations

  1. Department of Mechanical and Product Design Engineering, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Melbourne, 3122, Australia

    A. Mohammadhosseini & S. H. Masood

  2. Commonwealth Scientific and Industrial Research Organisation, Clayton, Melbourne, 3168, Australia

    D. Fraser & M. Jahedi

Authors
  1. A. Mohammadhosseini
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  2. S. H. Masood
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  3. D. Fraser
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  4. M. Jahedi
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Correspondence to S. H. Masood.

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Mohammadhosseini, A., Masood, S.H., Fraser, D. et al. Dynamic compressive behaviour of Ti-6Al-4V alloy processed by electron beam melting under high strain rate loading. Adv. Manuf. 3, 232–243 (2015). https://doi.org/10.1007/s40436-015-0119-0

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  • DOI: https://doi.org/10.1007/s40436-015-0119-0

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