Microstructural evolution during ageing of Al-Cu-Li-x alloys
arXiv:1510.02917 · doi:10.1016/j.actamat.2013.12.001
Abstract
In this study atom probe tomography was used to investigate the microstructure of AA2198 (Al-1.35Cu-3.55Li-0.29Mg-0.08Ag) over a range of ageing conditions to examine the evolution of phases in the alloy, in particular aiming to reveal the nucleation mechanism of the strengthening T1 phase, which has been under debate for decades. T1 precursor phases were observed from early ageing, a significant number of which were connected to solute-enriched dislocations. Ag and Mg segregation to T1 interfaces was convincingly observed when the plates were oriented perpendicular to the probing direction, which is the condition under which the spatial resolution of the atom probe data is highest.
References in corpus (1)
Cited by in corpus (6)
- Metrology of small particles and solute clusters by atom probe tomography
- Clustering kinetics during natural ageing of Al-Cu based alloys with (Mg, Li) additions
- A combinatorial approach for studying the effect of Mg concentration on precipitation in an Al-Cu-Li alloy
- High throughput evaluation of the effect of Mg concentration on natural ageing of Al-Cu-Li-(Mg) alloys
- The Benefits of Trace Cu in Wrought Al-Mg Alloys
- Influence of microstructural and crystallographic inhomogeneity on tensile anisotropy in thick-section Al-Li-Cu-Mg plates