Project Details
Projekt
Local-to-average crystal structures and mechanical properties in High-Entropy and Compositionally Complex fcc, bcc and hcp-based alloys studied by synchrotron methods
Applicant
Andrea Fantin, Ph.D.
Subject Area
Thermodynamics and Kinetics as well as Properties of Phases and Microstructure of Materials
Mechanical Properties of Metallic Materials and their Microstructural Origins
Mechanical Properties of Metallic Materials and their Microstructural Origins
Term
since 2017
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 388168974
Experimental synchrotron-based methods will be the core of the project, establishing a solid base on how the crystal structure of fcc, bcc, and hcp high entropy alloys / compositionally complex alloys can be modeled and compared at each different scale, local - medium range and average. A bcc-structured alloy well-known in literature will be used for such purpose: the refractory TiZrHfNbTa; for the hcpbased group, a novel alloy, Al15Sc10Ti25Zr25Hf25, is chosen, based on SPP networking and collaborations. The main technique used throughout the research project will be, as in the first funding period, X-ray absorption spectroscopy. Secondly, total scattering and diffraction measurements will be carried out for establishing the medium-to-long range order crystal structures. Once the structure at different scales is successfully determined, focus will turn into the correlation between structural properties and hardness, tensile, diffusion properties and literature data, depending on the system investigated. The TiZrHfNbTa, most investigated refractory bcc alloy in the literature, the correlation studied will be between the short-range order/lattice distortions and hardness and tensile properties. As for the Al15Sc10Ti25Zr25Hf25 alloy, the aim is the correlation between crystal structure and diffusion measurements, already being performed by SPP collaborators.
DFG Programme
Priority Programmes
