Comment on 'Special segregation of Cu on the habit plane of lath-like beta ' and QP2 precipitates in Al-Mg-Si-Cu alloys'

摘要

The recent experimental report on Cu segregation at the beta' interface in Al-Mg-Si-Cu [Y. Y. Weng et al., Scripta Mater. 151 (2018) 33] is argued to highlight either (i) a need to revisit generally accepted knowledge on the Cu stabilisation of metastable precipitates in this alloy system or (ii) an opportunity to strengthen existing theories. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.