Acta metallurgica sinica : English letters, 1996-05, Vol.9 (6), p.503-507
1996
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- DEVELOPMENT OF INCONEL~ ALLOY 783，A LOW THERMAL EXPANSION，CRACK GROWTH RESISTANT SUPERALLOY
- Ist Teil von
- Acta metallurgica sinica : English letters, 1996-05, Vol.9 (6), p.503-507
- Erscheinungsjahr
- 1996
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- Low thermal expansion superalloys have been used for a number of years in a variety of applications, including gas turbine engines. The low thermal expansion characteristics of the most widely used class of materials are derived from the ferromagnetic characteristics of Ni, Fe, and Co-based austenitic matrices containing little or no Cr. Alloy developments have been aimed at improving the oxidation resistance and stress accelerated grain boundary oxygen (SAGBO) attack. INCONEL alloy 783 is an oxidation resistant, low coefficient of thermal expansion superalloy developed for gas turbine applications. Alloy 783 represents a culmination in the development of an alloy system with very high aluminum content that, in addition to forming gamma ', causes beta aluminide phase precipitation in the austenitic matrix. This type of structure can be processed to resist both SAGBO and general oxidation, while providing low thermal expansion and useful mechanical properties up to 700 deg C. Key aspects of the alloy's development are presented.