Recrystallization Behavior of the Nickel-Based ODS Superalloy PM 1000

Hugo Ricardo Zschommler Sandim; Alexandra O.F. Hayama; Dierk Raabe

doi:10.4028/www.scientific.net/MSF.558-559.313

Paper Titles

Activated Slip Systems and Nucleation of Recrystallized Grains in Aluminium Deformed in Channel-Die
p.289

Texture Evolution during Annealing of Warm Rolled Cr-Containing Low Carbon Steels
p.295

Effect of Changing Homogenization Treatment on the Particle Structure in Mn-Containing Aluminium Alloys
p.301

Processing of Multi-Layered Al-Al(Sc) Hybrid Sheet by Accumulative Roll Bonding
p.307

Recrystallization Behavior of the Nickel-Based ODS Superalloy PM 1000
p.313

Radiation-Induced Recrystallization of U-Mo Fuel Particles and Radiation-Induced Amorphization of Interaction Products in U-Mo/Al Dispersion Fuel
p.319

Stored Energy Characterization after Low Deformation by Rolling or Tension of an IF-Ti
p.323

Local Microstructure Control of Pure Aluminum Utilizing Fiber-Laser Aided Spot Heating System
p.329

On the Recrystallisation Characteristics and Kinetics of a 9SMn28 Free Cutting Steel
p.333

HomeMaterials Science ForumMaterials Science Forum Vols. 558-559Recrystallization Behavior of the Nickel-Based ODS...

Recrystallization Behavior of the Nickel-Based ODS Superalloy PM 1000

Abstract:

PM 1000 is a nickel-based oxide dispersion strengthened (ODS) superalloy used for high-temperature applications. The primary recrystallization of a <100>-fiber textured coarsegrained oxide dispersion strengthened nickel-based superalloy (PM 1000) has been investigated. The annealing behavior of this alloy is quite complex. Even when annealing is performed at high homologous temperatures (e.g. 0.9 Tm, Tm is the melting point), recrystallization is partial. In order to understand such a behavior, the microstructure of specimens in both the as-received, deformed, and annealed conditions has been imaged in detail using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high-resolution electron backscatter diffraction (EBSD). In the annealed state we observe a significant volume fraction of tiny crystals in the interior of the recovered grains. These tiny grains are elongated and grow mostly along the existing low angle dislocation boundaries (anisotropic growth). In the present paper we propose a twinningassisted nucleation mechanism to clarify their origin during recrystallization.