[Lecture] Mechanical behavior of 3D printed titanium alloy porous scaffolds


Title: Mechanical behavior of 3D printed titanium alloy porous scaffolds
Speaker: Prof. Laichang Zhang (Edith Cowan University)
Venue: Room 303, Building No.38, Wushan Campus
Time: December 10, Tuesday, 09:30-12:00

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.

Announced by the School of Mechanical and Automotive Engineering