Examining of mechanical properties of transitive (variable) porous specimens produced by SLS using ti6Al4v alloy powder

Nowadays depending on improvement of additive manufacturing technologies, materials variety that can be used in this manufacturing method has been raised and titanium alloys also took part in this area. With the additive manufacturing technology, by creation of geometries whose production is not possible with conventional manufacturing methods, "personal implant" concept has arised and it has become possible to produce implants which are lighter and more compatible to the patient's defective area. Being higher of the rigidities of metallic implants produced by traditional manufacturing methods, according to the bones they were located in, may cause devastation on bone tissues around the implant in time. The elasticity of the implant to be implanted into the bone, is expected to be close to the bone. It can be created controlled transitive micro porous structures inside the implants thanks to additive manufacturing technologies. So, much more durable and light implants can be produced and they provide more osseointegration with the bone in located area by the help of their porous surfaces. In this study, mechanic properties of test specimens were examined which were produced by selective laser sintering using different parameters. Outer surfaces of the specimens have roughened with controlled porosity (semi spherical / elliptic geometry etc.) and inner region of the specimens were designed with transitive (variable) porosity. Tensile strenghts, compressive strenghts, impact resistances and hardnesses of the all specimens were measured and the best manufacturing parameter/parameters were determined. Results obtained from using different scanning strategies and different parameters were compared with literature