| Issue |
MATEC Web of Conferences
Volume 14, 2014
EUROSUPERALLOYS 2014 – 2nd European Symposium on Superalloys and their Applications
|
|
|---|---|---|
| Article Number | 07002 | |
| Number of page(s) | 6 | |
| Section | Session 7: Process - Microstructure Interactions | |
| DOI | https://doi.org/10.1051/matecconf/20141407002 | |
| Published online | 29 August 2014 | |
Solutions for the “difficult-to-deform” wrought superalloys
High Temperature Materials Division, China Iron and Steel Research Institute Group, Beijing 100081, China
a Corresponding author: zhaji@public3.bta.net.cn
Microstructure observation suggested that slowing down the cooling rate influence γ′ precipitation obviously and consequently produces coarse γ′ which could significantly improve plastic flow behavior that helps to break down the cast microstructures of wrought superalloys with high volume fraction of γ′. After full recrystallization, a modified dual-phase microstructure containing refined γ matrix plus coarse γ′ shows superplasticity during subsequent hot deformation. It also proved that soft lagging casing method is effective to retard the surface heat radiation of the pre-heated ingots during cogging operation.
© Owned by the authors, published by EDP Sciences, 2014
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