DMLS Materials - Technical Specifications

Source: EOS
Technical Data
DMLS Materials - Technical Specification
Ti64 Titanium alloy (EOS Ti64)
Physical & Chemical properties
Minimum recommended layer thickness 30 µm Relative density with standard parameters approx. 100% (4.43 g/cm 3 )
Minimum wall thickness
0.8 mm
Volume rate ~3 mm 3 /s
Mechanical properties at 20 0 C
(vertical orientation)
Ultimate tensile strength
Yield strength (Rp 0.2%)
After stress-relieving
1150 MPa + 60 MPa
1030 MPa + 70 MPa
Elongation at break 11% + 2%
Young’s Modulus
Hardness
110 GPa + 7 GPa
414 + 15 HV
Surface roughness
- after shot-peening approx. R a
4 µm
Thermal properties
Maximum operating temperature 350°C
Typical applications
• Direct manufacture of functional prototypes, small series products, individualised products or spare parts
• Parts requiring a combination of high mechanical properties and low specific weight, e.g. structural and engine components
for aerospace and motor racing applications, etc.
• Biomedical implants
Stress relieving procedure:
Stress relieving is done in a stress relieving furnace under argon atmosphere or in a vacuum furnace. The stress relieving sequence is
as follows:-
1. ramp up to 650 °C in 60 minutes
2. hold for 3h
3. furnace heating power off and open the furnace door when temperature dropped down to approx. 400°C
Annealing:
Material composition:
Ti
Al
88.4-91.0 wt%
5.5-6.5 wt%
O 2
N
V 3.5-4.5 wt% C
< 2000 ppm
< 500 ppm
< 800 ppm
Specific properties can be modified by annealing the parts at various temperatures ranging from 650 to 850°C and for dwell times
between 1 and 4h.
H 2
Fe
< 120 ppm
< 2500 ppm