Article ID Journal Published Year Pages File Type
1575245 Materials Science and Engineering: A 2014 5 Pages PDF
Abstract
Free-standing Pt-aluminide (PtAl) bond coat, when subjected to tensile testing at high temperatures (T≥900 °C), exhibits significant decrease in strength and increase in ductility during deformation at strains exceeding that corresponding to the ultimate tensile strength (UTS), i.e., in the post-UTS regime. The stress-strain curve is also marked by serrations in this regime. Electron back scattered diffraction (EBSD) and transmission electron microscopy (TEM) studies suggest dynamic recovery and recrystallization (DRR) as the mechanisms for the observed tensile behavior in the coating. Activation energy values suggest vacancy diffusion assists DRR. The fine recrystallized grains formed after deformation had a strong 〈110〉 texture.
Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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