On the Occurrence of the Metastable Phase β″ in an AlSiMg Alloy

Abstract

The crystal structure of the needle‐shaped metastable β″ phase in an AlSiMg alloy has been studied by electron diffraction. Three different matrix orientations, [001], [101], and [112] were obtained using a tilt‐rotation goniometer stage and checked with a computed stereographic projection. The β″‐phase structure has been found to be monoclinic (a = c = 6.16 Å, b = 7.1 Å, β = 82°) in excellent confirmation to Schegoleva's X‐ray analysis [6]. Copyright © 1974 WILEY‐VCH Verlag GmbH & Co. KGaA