Effect of strain rate on microstructure evolution of a nickel-based superalloy during hot deformation

• Published in: Materials in engineering Vol. 80; pp. 51 - 62
• Main Authors: Zhang, Hongbin, Zhang, Kaifeng, Zhou, Haiping, Lu, Zhen, Zhao, Changhong, Yang, Xiaoli
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 05.09.2015
• Subjects: Adiabatic temperature rise; Deformation; Dislocation density; DRX; Electron back scatter diffraction; Evolution; Grain growth; Microstructure; Nickel base alloys; Nickel-based superalloy; Strain rate; Superalloys; Twinning; Dislocation density; Nickel-based superalloy; Twinning; DRX; Adiabatic temperature rise

[Display omitted] •The DRX process was accelerated at high strain rates due to high stored energy and adiabatic heating.•The grains with GOS value less than 2° were considered as DRX grains for the studied alloy.•Majority of Σ3 boundaries were formed in the DRX process by growth accidents.•There was...