Microstructural tailoring to promote Portevin-Le Chatelier effect in laser powder bed fusion fabricated AlMgScZr alloy

Materials Science and Engineering A 2026 Open access

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Authors: Ali Asghar Rezaei, Mohsen K. Keshavarz, Sagar Patel, Kevin P. Slattery, John Barnes, Mihaela Luminita Vlasea
DOI: 10.1016/j.msea.2025.149708
Cited by: 1
References: 30

Abstract

The microstructure of an AlMgScZr alloy was successfully tailored via laser powder bed fusion (LPBF). Employing keyhole melting mode resulted in the occurrence of mixed type A+B Portevin-Le Chatelier (PLC) effect with a substantial threefold increase in ductility and a modest enhancement in tensile strength. The underlying mechanism was ascribed to the balanced microstructure of the keyhole samples with a finer grain size, shorter Burgers vector, and less microstrain, which facilitates continuous deformation via PLC. This study offers new insights into property design during LPBF.

Fields of Study & Subjects

Additive Manufacturing Materials and Processes High Entropy Alloys Studies Nuclear Materials and Properties

Publication details

Journal / source
Materials Science and Engineering A
Publisher
Elsevier BV
Volume
953
Pages
149708–149708
Publication date
3 January 2026
Language
EN