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AMDAPTM R718
Characteristics
- AMDAPTM R718 is a precipitation hardening Ni based alloy with high-temperature strength and corrosion resistance.
- Suitable for SLM additive manufacturing thanks to its superior flowability.
- Good tensile and creep rupture strength up to 700 °C.
Major applications
- Gas turbine components
- Liquid fuel and exhaust systems
- Jet engine and high-speed airframe parts
- Measuring instruments
- High temperature engineering
Typical chemical composition
| Product | Chemical composition (mass%) | |||||||
| C | Ni | Cr | Mo | Ti | Al | Nb+Ta | Fe | |
| AMDAPTM R718 | 0.03 | 53 | 19 | 3 | 1 | 0.5 | 5.1 | Bal. |
Typical particle size
| Particle size [μm] |
| -53/25 |
Typical printed microstructure*1
Cross-section
As-printed density (Area ratio): >99.9%
Average density: 8.23g/cm3
Microstructure
As-printed
After heat treatment
Mechanical Properties*1
①Tensile properties*3
| Direction | Test temperature | Condition of test specimen | Yield strength (MPa) |
Tensile strength (MPa) |
Elongation (%) |
Reduction of area (%) |
|
| AMDAPTM R718 | XY-direction (Horizontal) |
Room temperature | As-printed | 819 | 1108 | 27 | 38 |
| HT*2 | 1333 | 1546 | 14.3 | 18.2 | |||
| 649°C | HT | 1113 | 1258 | 11.5 | 14.1 | ||
| Z-direction (Vertical) |
Room temperature | As-printed | 637 | 973 | 36 | 49 | |
| HT | 1212 | 1389 | 19.2 | 32.3 | |||
| 649°C | HT | 1004 | 1144 | 23.6 | 35.1 | ||
| (Reference) AMS 5662 |
XY-direction | Room temperature | HT | ≧1034 | ≧1241 | ≧6 | ≧8 |
| 649°C | HT | ≧862 | ≧965 | ≧6 | ≧8 | ||
| Z-direction | Room temperature | HT | ≧1034 | ≧1276 | ≧12 | ≧15 | |
| 649°C | HT | ≧862 | ≧1000 | ≧12 | ≧15 |
②Creep rupture properties*4 (649℃, 689MPa)
| Direction | Condition of test specimen | Time for rupture (h) |
Elongation (%) |
Reduction of area (%) |
|
| AMDAPTM R718 | XY-direction (Horizontal) |
HT*2 | 125 | 1.3 | 2.5 |
| Z-direction (Vertical) |
HT | 123 | 10.9 | 11.7 | |
| (Reference) AMS 5662 |
― | HT | ≧23 | ― | ― |
*1Printed by EOS M290
*2HT: Heat treatment condition (AMS5662)
1. Solution Annealing: 968℃ ×1h, water cool
2. Aging treatment: 718℃ ×8h→56℃/h furnace cool→621℃ ×8h, air cool
*3Test method: (Room temperature) ASTM E8
(649℃) ASTM E21
*4Test method: ASTM E139 (Smoothed test-piece)
