Publications by authors named "Chantal K Sudbrack"
Microstructure and Creep Properties of Boron- and Zirconium-Containing Cobalt-based Superalloys.
Mater Sci Eng A Struct Mater
November 2016
The effects of micro-additions of boron and zirconium on grain-boundary (GB) structure and strength in polycrystalline γ(f.c.c.
View Article and Find Full Text PDFWhat determines the morphology of a decomposing alloy? Besides the well-established effect of the nucleation barrier, we demonstrate that, in a concentrated multicomponent Ni(Al,Cr) alloy, the details of the diffusion mechanism strongly affect the kinetic pathway of precipitation. Our argument is based on the combined use of atomic-scale observations, using three-dimensional atom-probe tomography (3D APT), lattice kinetic Monte Carlo simulations and the theory of diffusion. By an optimized choice of thermodynamic and kinetic parameters, we first reproduce the 3D APT observations, in particular the early-stage transient occurrence of coagulated precipitates.
View Article and Find Full Text PDFArticle Synopsis
- The study examines how tungsten (W) affects the development of gamma' precipitates in a specific model Ni-Al-Cr alloy through advanced microscopy techniques.
- The alloys tested include Ni-10 Al-8.5 Cr and a variant with W, both aged at 1073 K, showing early spherical gamma' precipitates that gradually change to cuboidal shapes over time.
- Findings reveal that W influences the concentration profiles within the precipitates, reducing the growth rate and enhancing the segregation of aluminum (Al) and chromium (Cr) during aging.