Titanium Metal 3D Printing
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About 3D Printing in Titanium
Titanium is widely used in the medical field because of its biocompatibility. Implants manufactured by titanium 3D printing are a good choice because these parts can be made into hollow structures and have complex surface geometry, which is conducive to the attachment and growth of bone tissue.
In short, titanium has the advantages of high strength-to-weight ratio, corrosion resistance and biocompatibility. 3D printing technology can freely construct the complex shapes of titanium, which makes titanium 3D printing ideal for medical implants and aerospace fields.
Titanium 3D Printing at a Glance
| Application | Prostheses, medical implants, aircraft components |
| Advantages | Corrosion-resistant, lightweight, high strength-to-weight ratio |
| Disadvantages | High cost |
| Typical Lead Time | 7 Business Days |
| Price | $$$$ |
| Minimum Feature Size | Typically 0.016” - 0.020” (0.406 mm - 0.508 mm) |
| Layer Height | 0.0012” - 0.0016" (0.0305 mm - 0.04064 mm) |
| General Tolerances | 0.005” (0.127 mm) is possible for the first inch of height. For every inch thereafter, an additional 0.002” (0.0508 mm) is added to the tolerance. |
| Max Part Size | 10” x 10” x 10” (254 mm x 254 mm x 254 mm) |
DMLS Titanium Ti64
Ti-6Al-4V, also known as Ti64, is the most widely used titanium alloy, consisting of 6% aluminum and 4% vanadium. Compared with commercial pure titanium,Ti64 alloy has higher mechanical properties. In addition,Ti64 has excellent corrosion resistance and biocompatibility, and the main applications of Ti64 include: surgical implants, aerospace fields, turbine blades, etc
DMLS Titanium Properties
| Tensile Strength (MPa) | Yield Strength (MPa) | Elongation at Break (%) | Hardness (Brinell) | Density (g/cm^3) |
|---|---|---|---|---|
| 1290 ± 50 | 1140 ± 50 | 7 ± 3 | 304 | 4.41 |
Finishes
The density of parts made of 3D printed titanium is comparable to that made by subtractive machining methods. These printed parts can also undergo similar subsequent machining or polishing. It should be noted that titanium is a more difficult metal to process.
Standard post-treatment includes removing the support structure during printing and using sandblasting to achieve an even appearance.
CNC machining or polishing: In some cases, parts may require additional CNC machining or polishing to complete a specific function of the component. However, these cases are assessed on a case-by-case basis.
Cost-saving Design Tips
To reduce the cost of titanium 3D printing, consider the following tips:
First, the DFM principle is applied in the design to ensure that the powder discharge hole is reserved in the closed area of the model to facilitate the cleaning of the unmelted powder.
Second, design with support structure in mind,DMLS printing usually requires support structure to avoid warping.
Third, optimize the design, rational use of materials, avoid excessive waste.
Fourth, assess the post-processing needs and only carry out the necessary post-processing.