|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Materials Discovery and Optimization – From Bulk to Materials Interfaces and 2D Materials
||The Evolution of θ′ Precipitates in an Al-Cu Alloy Investigated with Phase Field Theory
||Patrick Shower, Balasubramaniam Radhakrishnan, James Morris, Amit Shyam
|On-Site Speaker (Planned)
This work utilizes the MOOSE Phase Field module to predict the evolution of strengthening precipitates in an Al-Cu alloy. The phase of interest is the thermodynamically metastable θ′ (Al2Cu), the primary strengthening precipitate in many commercial cast aluminum alloys. The upper limit of service temperature for these alloys is, in practice, related to the thermodynamic phase stability of θ′ precipitates. Phase Field simulations are performed incorporating ab initio calculations of interfacial energy and lattice strain for various levels of Cu content and microalloying additions to provide quantitative, verifiable predictions of microstructural evolution at elevated temperatures. These phase field simulations are compared to observed microstructural evolution in Al-Cu alloys. It is demonstrated that the structural and chemical contributions to the elevated temperature stability of the strengthening phase can be delineated with this approach.
||Definite: None Selected