Atomic-Scale Investigation of Mirrorlike Structures in Multi-Oriented η Particles in an Al-Zn-Mg-Cu Aluminum Alloy

doi:10.1016/j.mtnano.2026.100842

Atomic-Scale Investigation of Mirrorlike Structures in Multi-Oriented η Particles in an Al-Zn-Mg-Cu Aluminum Alloy

2026-05-06

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R. Devesh Kumar Misra

DOI：10.1016/j.mtnano.2026.100842

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• Mirrorlike structures with two distinct mirror planes, (20 5)η and (20 1)η, were identified in multi-oriented η precipitates in an Al–Zn–Mg–Cu aluminum alloy. • These mirrorlike structures were found to form through both coalescence and growth mechanisms. • Localized mirrorlike structures introduced numerous defects that may hinder dislocation motion within the η phase. • The formation mechanism of pentagonal defects is identified, revealing that they originate from 360° surrounding mirror-like structures.

Keywords:

mirrorlike structures

η precipitates

Al-Zn-Mg-Cu aluminum alloy

defect formation

dislocation motion

Atomic-Scale Investigation of Mirrorlike Structures in Multi-Oriented η Particles in an Al-Zn-Mg-Cu Aluminum Alloy

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