| Catalog No. | DP2794 |
|---|---|
| Appearance | Gray metallic powder |
| Grade | Alloy Grade: FGH 4095 Related Grades: Rene 88DT |
Stanford Advanced Materials (SAM) provides Rene 88DT Alloy Powder suitable for 3D Printing applications. As the additive manufacturing industry advances, so will our additive manufacturing powder product offerings.
Rene 88DT Alloy Powder was developed to be more damage tolerant than Rene’ 95, hence the DT designation, while offering improved creep strength and fatigue crack growth resistance. The production alloy is always processed through the powder metallurgy route. The standard heat treatment consists of: a super-solvus solution of 1.0 hr at 1150°C (2100), followed by a delayed oil quench, and aging for 8.0 hr at 760°C (14OO). Its main structural characteristics are thus a fine grain size, achieved through PM consolidation, and a duplex distribution of, the coarser forming on cooling from the super solvus solution, the finer predominantly on aging. Rene 88DT is used in disk applications in advanced General Electric Co. engines.
| Product Name | Rene 88DT Alloy Powder |
| Alloy Grade | FGH 4096 |
| Related Grades | Rene 88DT |
| Composition | C 0.02-0.05 Cr 15-16.5 Co 12.5-13.5 W 3.8-4.2 Mo 3.8-4.2 Al 2.0-2.4 Ti 3.5-3.9 Fe 0.5 max Ni BalNb 0.6-1.0 Ta 0.02max B 0.006-0.015 Zr 0.025-0.05 Ce 0.005-0.01 Si 0.2max Mn 0.15max P 0.015max S 0.015max |
| Size Grades | -105+45micron
-53+15micron |
| ASTM | / |
| AMS Specification | / |
Rene 88DT Alloy Powder is an extremely stable alloy for prolonged 650°C (1200°F) service. Its superior properties reflect a high content and whose low positive mismatch allows a highly coherent and finer precipitation. These advantages are optimized by a super solvus annealing practice that eliminates large, sub-solvus phases, which promote crack nucleation in fatigue, and interfere with the formation of serrated grain boundaries. Due to the super-solvus nature of the solution anneal, the microstructure of Rene 88 DT contains no sub-solvus which is usually termed primary. Normal convention refers to the cooling as secondary, and that forms predominantly on aging, as tertiary.
Reference
S. T. Wlodek, M. Kelly and D. A. Alden: THE STRUCTURE OF RENE’ 88 DT. DOI:10.7449/1996/Superalloys_1996_129_136
