Characterization of the T'-Phase Interface in Al-Zn-Mg Alloy Along the <112> Zone Direction of Al-Matrix

Abstract

In this study, we observed the T'-phase for the first time along the zone axis of the Al matrix. The orientation relationship, shape, misfit value, and interfacial conditions between the T'-phase and the Al matrix were investigated using highresolution transmission electron microscopy (HR-TEM). The T'-phase exhibited a fine cubic morphology, and we clarified each facet by analyzing diffraction patterns and fast Fourier transform (FFT) images. Additionally, we identified the (11–1)Al //(001)T' , (11–0)Al //(1–00)T' interface between the T'-phase and the Al matrix along the [1–1 – 2–]Al //[010]T' zone direction.

Keywords

• hrtem
• mg32(al,zn)49
• precipitation
• t'-phase
• alznmg
• orientation relationship