THE RECRYSTALLIZATION AND GRAIN GROWTH OF INCONEL
The results show the wide temperature range over which recrystallization of Inconel is possible. It appears that a temperature of l7O F will obtain recrystullization of all worked structures regardless of the severity, but that the resulting final grain size, at least for short exposures, will depend on the degree of prior cold work. When the materinl has a coarse-grain size prior to deformation, a somewhat higher temperature for recrystallization is required. Also, the carbides in the grain boundaries of the worked, coarse-grain material remain fixed when recrystallization occurs so that the new grains do not receive the usual contribution to their creep resistance from such particles. Thus it can be assumed that the mechanical properties of such a structure would be inferior to material of a similar grain size, but with the carbides more favorably situated. This mixed structure is still found in some cases aftur a 2- hr anneal at 1800 F, and therefore is not completely eliminated until treated at l9O0 F. Finally, it appears to make littie difference to the grain size resulting from a l9O F anneal, whether the material was initially fine or coarse grain, or the degree of prior cold work to which it was subjeted. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-13-001386
- OSTI ID:
- 4327352
- Report Number(s):
- ORNL-2406
- Country of Publication:
- United States
- Language:
- English
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