Plastic additive manufacturing versus circular economy.- Implant shape and modeling approaches effects on the biomechanical tibia-bone response.- Age- and Strain-Hardening Effects on Internal Thread : Tensile, Hardness and Pull-out Tests.- Calculation of Internal Thread Yield Strength with Various Assumptions.- Comparative study of form and cut tapping of AA2017 and AA1050 aluminum alloys.- Effects of die parameters on external inversion of thin-walled tube.- Effects of Thickness Reduction by Machining on Tensile behavior Using Proportional Specimens.- Investigation the effect of the magnesium fluoride addition on the mechanical propertie of TCP-TiO2 composite for biomedical application.- New Approach for Predicting the Ultimate Load Capacity of AA2017 Aluminum Tapped Thread.- Porosity and mechanical properties of PLA structures printed by FFF-3D-printing process with actual case study.- Degradation resistance of graphitein contact with industrial Phosphoric acid mixed with an oxidizing agent through dynamic and static approches.