PSI - Issue 14

Tulsi Chouhan et al. / Procedia Structural Integrity 14 (2019) 883–890 Author name / Structural Integrity Procedia 00 (2018) 000–000

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4. Conclusions The presented study reveals the compressive high strain rate properties of four different types of Al specimen fabricated by powder metallurgy route. From the experimental studies the following conclusions are drawn: i.) Generally, Aluminum irrespective of processing type reveals rate-dependent behavior, with increasing stresses as a function of the increasing rate of loading. ii.) Ball milling enhances Al properties as a function of reducing powder size but also changes the rate dependent behavior of material from strain induced hardening to strain induced softening towards the end of the loading cycle. iii.) Substantial addition of rock salt was considered for the betterment of properties, but the same resulted in deterioration of properties. iv.) Dissolving a part of specimen resulted in lower specimen densities. However, the resulting properties were even lower. Acknowledgments The authors are thankful to the Mechanical Engineering Department, IIT Delhi for the grant of permission to conduct the experimental works. References Asija, Neelanchali et al. 2017. “High Strain Rate Behavior of STF-Treated UHMWPE Composites.” International Journal of Impact Engineering 110: 359–64. https://doi.org/10.1016/j.ijimpeng.2017.02.019. Behm, Nathan et al. 2016. “A Quasi-Static and High-Rate Mechanical Behavior of Aluminum-Based MMC Reinforced with Boron Carbide of Various Length Scales.” Materials Science & Engineering A 650: 305–16. http://dx.doi.org/10.1016/j.msea.2015.10.064. Chouhan, Hemant, Neelanchali Asija, Shishay Amare, and Naresh Bhatnagar. 2017. “Effect of Specimen Thickness on High Strain Rate Properties of Kevlar / Polypropylene Composite.” Procedia Engineering 173: 694–701. Gama, Bazle A, Sergey L Lopatnikov, and John W. Jr Gillespie. 2014. “Hopkinson Bar Experimental Technique : A Critical Review.” Appl Mech Rev 57(4): 223–50. Kolsky, H. 1949. “An Investigation of the Mechanical Properties of Materials at Very High Rates of Loading.” Proc Phys Soc London B 62: 676–700. Liu, Bin et al. 2013. “Compressive Behavior of High Particle Content B4C/Al Composite at Elevated Temperature.” Transactions of Nonferrous Metals Society of China (English Edition) 23(10): 2826–32. Naik, N K, Veerraju Ch, and Venkateswara Rao Kavala. 2008. “Hybrid Composites under High Strain Rate Compressive Loading.” Materials Science and Engineering A 498: 87–99. Peroni, M., G. Solomos, and V. Pizzinato. 2012. “Impact Behaviour Testing of Aluminum Foam.” International Journal of Impact Engineering 53: 74–83. http://dx.doi.org/10.1016/j.ijimpeng.2012.07.002. Razavi-Tousi, S. S., and J. A. Szpunar. 2015. “Effect of Ball Size on Steady State of Aluminum Powder and Efficiency of Impacts during Milling.” Powder Technology 284: 149–58. http://dx.doi.org/10.1016/j.powtec.2015.06.035. Tan, Z H et al. 2007. “The Dynamic Mechanical Response of SiC Particulate Reinforced 2024 Aluminum Matrix Composites.” Materials Letters 61: 4606–9. Vecchio, Kenneth S, and Fengchun Jiang. 2007. “Improved Pulse Shaping to Achieve Constant Strain Rate and Stress Equilibrium in Split Hopkinson Pressure Bar Testing.” Metallurgical and Materials Transactions A 38 A: 2655–65. Zhang, Boyi et al. 2016. “Quasi-Static and High Strain Rates Compressive Behavior of Aluminum Matrix Syntactic Foams.” Composites Part B 98: 288–96. http://dx.doi.org/10.1016/j.compositesb.2016.05.034. Zhang, Xin-ming et al. 2008. “Dynamic Property Evaluation of Aluminum Alloy 2519A by Split Hopkinson Pressure Bar.” Transactions of Nonferrous Metals Society of China 18(1): 1–5. Zhang J, Shi H, Cai M, Liu L and Zhai P, 2009. The dynamic properties of SiC/Al composites fabricated by spark plasma sintering with powders prepared by mechanical alloying process. Material Science and Engineering A, 527, 218-224.