An examination of hot deformation and recrystallization of alloy 617
- Colorado School of Mines, Golden, CO (United States)
- INCO Alloys International, Inc., Huntington, WV (United States)
The current processing of INCONEL{reg_sign} alloy 617 plate has often resulted in variations in the finished microstructure. To achieve a true understanding of microstructural development, a characterization of how microstructure responds to each processing step must be developed. The present study has determined how the microstructure of alloy 617 responds to variations in mill process conditions during ingot breakdown via hot-rolling. In order to characterize microstructural evolution, the deformation due to hot-rolling was simulated using hot-compression tests conducted on a Gleeble 1500 testing system. Processing parameters were varied in a test matrix for the hot-compression tests to isolate the effect of each parameter. Quantitative metallography was used to determine percent recrystallization and/or grain size of the sectioned compression specimens after testing. Flow stress analysis was used to detect microstructural instabilities, such as dynamic recrystallization during deformation. The results of the study indicate that total strain and temperature are the two most important processing parameters. Total strain significantly effects recrystallization kinetics, while temperature control is needed to prevent edge cracking and ensure recrystallization. Strain rate influences whether the mechanism of recrystallization is static or dynamic.
- OSTI ID:
- 233941
- Report Number(s):
- CONF-950908--; ISBN 0-87170-539-7
- Country of Publication:
- United States
- Language:
- English
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