In this study, carbon fiber (CF) reinforced magnesium matrix composites were used as the research object. Composites with micro-macro cross-scale layered configurations were designed and prepared by powder metallurgy sintering process. The tensile test results show that when the carbon fiber content is 1.2 wt.% and the thickness of the single-layer composite is 3.5 mm, the material exhibits excellent strength-ductility matching: the tensile strength is 269 MPa and the elongation at break is 14.7%, which achieves good plasticity while significantly improving the strength. The study further systematically analyzed the synergistic contribution of traditional strengthening mechanism and back stress strengthening to material strength, and revealed the improvement effect of carbon fiber on material plasticity through internal ductility mechanisms such as “pulling out”, as well as external energy dissipation pathways such as crack deflection. This work provides a new structural design idea for simultaneously improving the strength and ductility of magnesium matrix composites, and has important reference value for the optimization of its comprehensive mechanical properties.
References
[1]
Ouyang, M. and Li, Y. (2025) Perspectives on New Energy Revolution in China. CSEE Journal of Power and Energy Systems, 11, 2623-2638. https://doi.org/10.17775/cseejpes.2025.06840
[2]
Yan, L. and Xu, H. (2025) Lightweight Composite Materials in Automotive Engineering: State-of-the-Art and Future Trends. AlexandriaEngineeringJournal, 118, 1-10. https://doi.org/10.1016/j.aej.2024.12.002
[3]
Xu, M., Qu, J. and Li, M. (2022) National Policies, Recent Research Hotspots, and Application of Sustainable Energy: Case of China, USA, and European Countries. Sustainability, 14, Article 10014. https://doi.org/10.3390/su141610014
[4]
Najar, F.A., Rathee, S. and Srivastava, M. (2025) Recent Advances in Friction Stir Processing of Magnesium Alloys: Microstructure, Properties, and Applications. MetalsandMaterialsInternational. https://doi.org/10.1007/s12540-025-02092-6
[5]
Calado, L.M., Carmezim, M.J. and Montemor, M.F. (2022) Rare Earth Based Magnesium Alloys—A Review on WE Series. FrontiersinMaterials, 8, Article 804906. https://doi.org/10.3389/fmats.2021.804906
[6]
Qi, L., Li, S., Zhang, T., Zhou, J. and Li, H. (2019) An Analysis of the Factors Affecting Strengthening in Carbon Fiber Reinforced Magnesium Composites. Composite Structures, 209, 328-336. https://doi.org/10.1016/j.compstruct.2018.10.109
[7]
Tuli, N.T., Khatun, S. and Rashid, A.B. (2024) Unlocking the Future of Precision Manufacturing: A Comprehensive Exploration of 3D Printing with Fiber-Reinforced Composites in Aerospace, Automotive, Medical, and Consumer Industries. Heliyon, 10, e27328. https://doi.org/10.1016/j.heliyon.2024.e27328
[8]
Breish, F., Hamm, C. and Andresen, S. (2024) Nature’s Load-Bearing Design Principles and Their Application in Engineering: A Review. Biomimetics, 9, Article 545. https://doi.org/10.3390/biomimetics9090545
[9]
Wang, Y., Zhu, Y., Yu, Z., Zhao, J. and Wei, Y. (2022) Hetero-Zone Boundary Affected Region: A Primary Microstructural Factor Controlling Extra Work Hardening in Heterostructure. ActaMaterialia, 241, Article ID: 118395. https://doi.org/10.1016/j.actamat.2022.118395
[10]
Wang, Y., Du, J. and Xiao, H. (2023) Interfacial Evolution and Coordinated Deformation Mechanism of Ti/Al Laminated Metal Composites Prepared by Diffusion Bonding. JournalofMaterialsResearchandTechnology, 27, 4541-4551. https://doi.org/10.1016/j.jmrt.2023.10.264
[11]
Rawat, N.K., Jain, N., Mishra, A.K. and Verma, A. (2024) Atomistic-Scale Simulations on Grain Boundary Migration Mechanisms Involved in Metals and Alloys: A Critical Review. ArchivesofComputationalMethodsinEngineering, 32, 1931-1968. https://doi.org/10.1007/s11831-024-10201-8
[12]
Ding, Y., Xu, J., Hu, J., Gao, Q., Guo, X., Zhang, R., et al. (2020) High Performance Carbon Nanotube-Reinforced Magnesium Nanocomposite. Materials Science and Engineering: A, 771, Article ID: 138575. https://doi.org/10.1016/j.msea.2019.138575
[13]
Huang, Y., Li, J., Wan, L., Meng, X. and Xie, Y. (2018) Strengthening and Toughening Mechanisms of CNTs/Mg-6Zn Composites via Friction Stir Processing. Materials Science and Engineering: A, 732, 205-211. https://doi.org/10.1016/j.msea.2018.07.011
[14]
Wu, L., Wu, R., Zhang, J., Hou, L. and Zhang, M. (2018) Synergistic Effect of Carbon Nanotube and Graphene Nanoplatelet Addition on Microstructure and Mechanical Properties of AZ31 Prepared Using Hot-Pressing Sintering. Journal of Materials Research, 33, 4261-4269. https://doi.org/10.1557/jmr.2018.421
[15]
Liu, F., Wang, Z., Du, X., Li, S. and Du, W. (2023) Microstructure and Mechanical Properties of Magnesium Matrix Composites Reinforced by in Situ Reduced Graphene Oxide. Materials, 16, Article 2303. https://doi.org/10.3390/ma16062303
[16]
Li, X., Li, Q., Nie, M., Kong, D., Liu, Z. and Zhang, Z. (2023) Evading the Strength-Ductility Trade-Off Dilemma in Steel-Nickel Heterostructured Material by Bionic Crossed-Lamellar Structures. VirtualandPhysicalPrototyping, 18, e2266640. https://doi.org/10.1080/17452759.2023.2266640
[17]
Gu, G.H., Kim, Y. and Kim, H.S. (2025) Back Stress Quantification in Heterostructured Metals: A Comparative Study of Tension-Compression and Loading-Unloading-Reloading Tests. MaterialsResearchLetters, 13, 1189-1198. https://doi.org/10.1080/21663831.2025.2568689
[18]
Yang, M., Pan, Y., Yuan, F., Zhu, Y. and Wu, X. (2016) Back Stress Strengthening and Strain Hardening in Gradient Structure. MaterialsResearchLetters, 4, 145-151. https://doi.org/10.1080/21663831.2016.1153004
[19]
David, A., Gopal, S.K., Lakshmanan, P. and Chenbagam, A.S. (2023) Corrosion, Mechanical and Microstructural Properties of Aluminum 7075—Carbon Nanotube Nanocomposites for Robots in Corrosive Environments. InternationalJournalofMinerals, MetallurgyandMaterials, 30, 1140-1151. https://doi.org/10.1007/s12613-022-2592-3
