Effect of eutectics on plastic deformation and subsequent recrystallization in the single crystal nickel base superalloy CMSX-4

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 532; pp. 487 - 492
• Main Authors: Wang, L., Pyczak, F., Zhang, J., Lou, L.H., Singer, R.F.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 2012; Elsevier
• Subjects: Applied sciences; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Cross-disciplinary physics: materials science; rheology; Deformation; Dislocation; Elasticity. Plasticity; Electron back scatter diffraction; Eutectics; Exact sciences and technology; Indentation; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Microstructure; Nickel base alloys; Physics; Recrystallization; Recrystallization (RX); Single crystal (SX) superalloy; Superalloys; Texture; Treatment of materials and its effects on microstructure and properties; Recrystallization (RX); Single crystal (SX) superalloy; Indentation; Eutectics; Dislocation; Nickel base alloys; High strain; Superalloys; Texture; EBSD; Dislocations; Monocrystals; Transmission electron microscopy; Plasticity; Recrystallization; Microstructure; Transition element alloys
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2011.11.015

► Deformation of a single crystal superalloy was studied by EBSD and TEM. ► Residual strain distribution in single crystal superalloys could be determined. ► Severe deformation was created in interdendritic regions. ► Dislocation distribution was consistent with recrystallization process.
The electron backscattered diffraction (EBSD) technique and transmission electron microscopy (TEM) were used to characterize the microstructure of a locally deformed single crystal (SX) nickel-base superalloy – CMSX-4. The effect of eutectics on the deformation and recrystallization (RX) behavior was investigated. It was found that the texture component map is a reliable method for the determination of the severity of deformation in locally deformed SX superalloys. Severe deformation was mainly created in interdendritic regions, especially around eutectics. The dislocation distribution and configuration was consistent with the nucleation and the growth behavior of recrystallizing grains.