| タイトル | Fabrication development for ODS-superalloy, air-cooled turbine blades |
| 本文（外部サイト） | http://hdl.handle.net/2060/19840017643 |
| 著者（英） | Moracz, D. J. |
| 著者所属（英） | TRW, Inc. |
| 発行日 | 1984-01-01 |
| 言語 | eng |
| 内容記述 | MA-600 is a gamma prime and oxide dispersion strengthened superalloy made by mechanical alloying. At the initiation of this program, MA-6000 was available as an experimental alloy only and did not go into production until late in the program. The objective of this program was to develop a thermal-mechanical-processing approach which would yield the necessary elongated grain structure and desirable mechanical properties after conventional press forging. Forging evaluations were performed to select optimum thermal-mechanical-processing conditions. These forging evaluations indicated that MA-6000 was extremely sensitive to die chilling. In order to conventionally hot forge the alloy, an adherent cladding, either the original extrusion can or a thick plating, was required to prevent cracking of the workpiece. Die design must reflect the requirement of cladding. MA-6000 was found to be sensitive to the forging temperature. The correct temperature required to obtain the proper grain structure after recrystallization was found to be between 1010-1065 C (1850-1950 F). The deformation level did not affect subsequent crystallization; however, sharp transition areas in tooling designs should be avoided in forming a blade shape because of the potential for grain structure discontinuities. Starting material to be used for forging should be processed so that it is capable of being zone annealed to a coarse elongated grain structure as bar stock. This conclusion means that standard processed bar materials can be used. |
| NASA分類 | AIRCRAFT PROPULSION AND POWER |
| レポートNO | 84N25711
ER-8162-F
NAS 1.26:174650
NASA-CR-174650 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/159394 |
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