Prof. Lai-Chang ZhangSchool of Engineering, Edith Cowan University, Perth, Australia
Speech Title: Mechanical Behavior of Beta-type Titanium Alloy Lattice Structures Fabricated by Additive Manufacturing
Abstract: Beta-type titanium porous structures are a new class of solution for implants because they offer excellent combination of high strength and low Young’s modulus. This presentation studies the influence of porosity variation in 3D printing (via electron beam melting (EBM)-produced and selective laser melting (SLM)) produced beta-type titanium alloy samples on the mechanical properties including super-elastic property, Young’s modulus, compression strength, energy absorption and fatigue properties. Compared with Ti-6Al-4V samples, the beta-type titanium porous samples exhibit a higher normalized fatigue strength owing to super-elastic property, greater plastic zone ahead of the fatigue crack tip and the crack deflection behaviour. Stress distribution results, obtained by finite element methods, coupled with the investigation of the slip bands generated have been used to reveal the plasticity mechanism and local stress concentrations for each structure. The topology optimized structure exhibits the best balance of bending and buckling stress with a high elastic energy absorption, a low Young’s modulus and a high compression strength.
1. Y.J. Liu, S.J. Li, H.L. Wang, W.T. Hou, Y.L. Hao, R. Yang, T.B. Sercombe, and L.C. Zhang*, Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting. Acta Materialia, Vol. 113, pp. 56-67 (2016). (ESI Highly Paper)
2. Y.J. Liu, H.L. Wang, S.J. Li, S.G. Wang, W.J. Wang, W.T. Hou, Y.L. Hao, R. Yang, and L.C. Zhang*, Compressive and fatigue behavior of beta-type titanium porous structures fabricated by electron beam melting. Acta Materialia, Vol. 126, pp. 58-66 (2017). (ESI Highly Paper)
3. S. Zhao, S.J. Li, S.G. Wang, W.T. Hou, Y. Li, L.C. Zhang*, Y.L. Hao, R. Yang, R.D.K. Misra, and L.E. Murr, Compressive and fatigue behavior of functionally graded Ti-6Al-4V meshes fabricated by electron beam melting. Acta Materialia, Vol. 150, pp. 1-15 (2018).
4. Y.J. Liu, S.J. Li, L.C. Zhang*, Y.L. Hao, and T.B. Sercombe, Early plastic deformation behaviour and energy absorption in porous β-type biomedical titanium produced by selective laser melting. Scripta Materialia, Vol. 153, pp. 99-103 (2018).
5. L.C. Zhang*, Y.J. Liu, S.J. Li, and Y.L. Hao, Additive manufacturing of titanium alloys by electron beam melting: A review. Advanced Engineering Materials, Vol. 20, No. 5, Article 1700842 (2018). (ESI Highly Paper)
6. L.C. Zhang* and L.Y. Chen, A Review on Biomedical Titanium Alloys: Recent Progress and Prospect. Advanced Engineering Materials, Vol. 21, No. 4, Article 1801215 (2019). (ESI Highly Paper)
7. Y.J. Liu, D.C. Ren, S.J. Li, H. Wang, L.C. Zhang* and T.B. Sercombe, Enhanced fatigue characteristics of a topology-optimized porous titanium structure produced by selective laser melting. Additive Manufacturing, Vol. 32, Article 101060 (2020).
8. N. Hafeez, J. Liu, L.Q. Wang, D.X. Wei, Y.J. Tang, W.J. Lu and L.C. Zhang*, Superelastic response of low-modulus porous beta-type Ti-35Nb-2Ta-3Zr alloy fabricated by laser powder bed fusion. Additive Manufacturing, Vol. 34, Article 101264 (2020). (ESI Highly Paper)
Biography: Lai-Chang Zhang is a Professor of Materials Engineering and the Program Leader–Mechanical Engineering in the School of Engineering at Edith Cowan University (Perth, Australia). After awarded his PhD in Materials Science and Engineering at the Institute of Metal Research, Chinese Academy of Sciences, Prof. Zhang held several positions at The University of Western Australian, University of Wollongong, IFW Dresden and Technische Universität Darmstadt. His research interests include metal additive manufacturing, light-weight alloys, nanocrystalline materials and metallic glasses, and nanomaterials for water treatment. He has published more than about 280 refereed journal papers with an H-index of 61 and 11500+ citations and 22 ESI Highly Cited Papers. He also served as Editor or Editorial Board Members for many journals, e.g. Advanced Engineering Materials, Metals (IF: 2.117), Frontiers in Materials, Materials Science and Technology, etc.