title: HRTEM and HAADF-STEM of precipitates at peak ageing of cast A319 aluminium alloy.
abstract: High-resolution transmission electron microscopy (HRTEM) and high-angle annular-dark-field scanning transmission electron microscopy (HAADF-STEM) were applied to investigate the precipitates formed during age hardening at 170±5°C for up to 48h of cast A319 aluminium alloy (Al-4.93wt%Si-3.47wt%Cu). The precipitates at the peak-aged condition have been identified as mainly θ" together with a smaller amount of θ'. It is proposed that the θ" is responsible for hardening at peak ageing at 170°C of the cast A319 aluminium alloy.
authors.affiliation: Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand. ampornw@nu.ac.th
authors.forename: Amporn
authors.initials: A
authors.lastname: Wiengmoon
authors.forename: John T H
authors.initials: JT
authors.lastname: Pearce
authors.forename: Torranin
authors.initials: T
authors.lastname: Chairuangsri
authors.forename: Seiji
authors.initials: S
authors.lastname: Isoda
authors.forename: Hikaru
authors.initials: H
authors.lastname: Saito
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kurata