Abstract
Inspired by the non-smooth surface of certain animals, a biomimetic coupling unit with various sizes, microstructure, and hardness was prepared on the surface of 7075 aluminum alloy. Following experimental studies were conducted to investigate the wear and tensile properties with various laser energy inputs. The results demonstrated that the non-smooth surface with biomimetic coupling units had a positive effect on both the wear resistance and tensile property of 7075 aluminum alloy. In addition, the sample with the unit fabricated by the laser energy of 420.1 J/cm2 exhibited the most significant improvement on the wear and tensile properties owing to the minimum grain size and the highest microhardness. Also, the weight loss of the sample was one-third of the untreated one’s, and the yield strength, the ultimate tensile strength, and the elongation improved by 20, 20, and 34% respectively. Moreover, the mechanisms of wear and tensile properties improvement were also analyzed.
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Acknowledgments
This work was supported by Project 985-High Performance Materials of Jilin University, Project 985-Bionic Engineering Science and Technology Innovation and double first-class project by Jilin Province and Jilin University (SXGJXX2017-14).
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Yuan, Y., Zhang, P., Zhao, G. et al. Effects of Laser Energies on Wear and Tensile Properties of Biomimetic 7075 Aluminum Alloy. J. of Materi Eng and Perform 27, 1361–1368 (2018). https://doi.org/10.1007/s11665-018-3162-8
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DOI: https://doi.org/10.1007/s11665-018-3162-8