Y'all should do a simple Google search sometimes. XD
C Titanium 64 housing formed via 3D printer
Shapes formed using a 3D printer don’t just appear with the touch of a button.
Different knowhow is especially necessary at each point when it comes to forms created from metal. Each point is quantified and accumulated as explicit knowledge. But when it comes to deciding how to go about combining all of this different knowhow and in what order of precedence, then what is necessary is the intuition of the craftsman. Rather than rendering the work of the craftsman unnecessary, shaping metal using a 3D printer necessitates there being human resources that could be termed digital craftsmen, in that they consider the output data to be created that takes into account the shape of the finished product, the cost, precision, the smoothness of the surface and a number of other elements. To reach the best output data for the housing here, we trialed a great number of prototypes.
And finishing off the surface is not easy either. The 3D printer irradiates metal powder over an extremely small area with a laser, melting it and then hardening it over and over so that the form is created. Owing to this, the surface is pocked with the marks left by the laser’s irradiation and has a rough finish. Polishing this up requires just as much knowhow as shaping the object does. It was thought that polishing it to the degree that its precision as a product was maintained was impossible. Here, with the cooperation of a coordinator specializing in specially-processed metals, we combined the skills of the craftsmen in many ways and with the output from the 3D printer, realized a beautifully polished finish for the titanium 64 (usually a hard metal to polish) housing.
Since they don't mention it anywhere, Wikipedia is also very useful sometimes.
Edited by miceblue - 3/15/14 at 4:58pm
Grade 5, also known as Ti6Al4V, Ti-6Al-4V or Ti 6-4, is the most commonly used alloy. It has a chemical composition of 6% aluminium, 4% vanadium, 0.25% (maximum) iron, 0.2% (maximum) oxygen, and the remainder titanium. It is significantly stronger than commercially pure titanium while having the same stiffness and thermal properties (excluding thermal conductivity, which is about 60% lower in Grade 5 Ti than in CP Ti). Among its many advantages, it is heat treatable. This grade is an excellent combination of strength, corrosion resistance, weld and fabricability.
"This alpha-beta alloy is the workhorse alloy of the titanium industry. The alloy is fully heat treatable in section sizes up to 15mm and is used up to approximately 400°C (750°F). Since it is the most commonly used alloy – over 70% of all alloy grades melted are a sub-grade of Ti6Al4V, its uses span many aerospace airframe and engine component uses and also major non-aerospace applications in the marine, offshore and power generation industries in particular."
"Applications: Blades, discs, rings, airframes, fasteners, components. Vessels, cases, hubs, forgings. Biomedical implants."
Generally, Ti-6Al-4V is used in applications up to 400 degrees Celsius. It has a density of roughly 4420 kg/m3, Young's modulus of 115 GPa, and tensile strength of 1000 MPa. By comparison, annealed type 316 stainless steel has a density of 8000 kg/m3, modulus of 193 GPa, and tensile strength of only 570 MPa. And tempered 6061 aluminium alloy has 2700 kg/m3, 69 GPa, and 310 MPa, respectively.