The advantage of additive manufacturing (AM) (e.g. reasonable time and expense in prototyping, and reliable product) has triggered the idea of using this method in manufacturing of marine vessels components. The current article tries to introduce basic concepts of AM method and its application in marine industry; have a glance at additive-manufactured parts microstructure; elaborate the challenges in investigation of mechanical properties of AM products; in order to makes this technology more known to domestic industry.

The design and manufacturing cubic porous scaffolds are a considerable notion in tissue engineering (TE). From additive manufacturing (AM) perspective, it has attained high appeal in the string of TE during the past decade. In the view of TE, the feasibili ty of manufacturing intricate porous scaffolds with high accuracy contrast to prominent producing methods has caused AM the outstanding option for manufacturing scaffold. From design perspective, porous scaffold structures play a crucial task in TE as scaf fold design with an adequate geometries provide a route to required strength and porosity. The target of this paper is achieve of best geometry to become an optimum mechanical strength and porosity of TE scaffolds. Hence, the cubic geometry has been chosen for scaffold and Cube, Cylinder and Hexagonal prism geometries have been selected for pore of structures. In addition, for noticing the porosity effects, pore size has been chosen in three size, and a whole of nine scaffolds have been designed. Designed s caffolds were generated using Fused Deposition Modeling (FDM) 3D Printer and dimensional specifications of scaffolds were evaluated by comparing the designed scaffolds with Scanning Electron Microscope (SEM). The samples were subjected to mechanical compre ssion test and the results were verified with th e Finite Element Analysis ( FEA). The results showed that f irstly, a s the porosity increases, the compressive strength and modulus of elasticity obviously decreased in all geometry pore scaffolds. Secondly, a s the geometry changes in similar porosity, cubic pore scaffold achieved higher compressive strength and modulus of elasticity than cylinder and hexagonal prime Experimental and FEM validated results proposed a privileged feasible pore geometry of cubic sc affold to be used in design and manufacturing of TE scaffolds.

additive manufacturing comprises a set of methods enabling layer-by-layer fabrication of components using a three-dimensional model. Conversely, in subtractive manufacturing, the process begins with a large volume of material and results in the final piece through material removal. One point of convergence between these two processes is the fabrication of machining tools (subtractive manufacturing), such as milling cutters, turning inserts, and boring tools, through additive manufacturing, which can potentially catalyze significant advancements in various machining processes. This article explores several machining tool prototypes fabricated via additive manufacturing and discusses their advantages and capabilities. Additionally, some tools whose properties have been enhanced through additive manufacturing by altering their chemical composition are introduced, and the prospect of multi-material tool fabrication with varying hardnesses is deliberated. Investigations indicate that advancements in additive manufacturing processes can lead to the development of advanced tools capable of producing components with higher hardness and more complex geometries

additive manufacturing (AM) has become popular for rapid prototyping and it is presently widely used in different branches of industry because of its advantages such as freedom of design, mass customization, waste minimization and the ability to manufacture complex shape. AM is the process of making 3D object from computer model data by depositing of material layer by layer. Topology optimization is iterative modifying the shape and optimizing material within a given designs space for load, boundary condition thus leading to weight reduction of components. Thus, to form lightweight components which have great advantage where energy consumption is minimal, topology optimization is used. Reducing weight and decreasing the material usage while keeping the product functions are the main challenges. Studies on the integration of the topology optimization and additive manufacturing, specifically mass reduction attract considerable attention. The topology optimization process is employed in this case study, to redesign a lightweight automotive brake pedal to show the potential of topology optimized design for additive manufacturing. As a result of this study 54. 07% weight reduction was achieved in the total mass. The thermo-mechanical analysis for additive manufacturing showed that the part without topological optimization 108 MPa of stress and 1, 099 mm of displacement were obtained and after optimization they were 196, 1 MPa and 1, 295 mm, respectively.