Grain structure evolution in Al-Mg(-Sc-Zr) alloys during additive friction stir deposition

IF 5.5 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-09-16 DOI:10.1016/j.matchar.2025.115566

Maureen Puybras , Véronique Massardier , Matthew Barnett , Michel Perez , Thomas Dorin

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引用次数: 0

Abstract

Additive Friction Stir Deposition (AFSD) is an emerging solid-state additive manufacturing process that enables the printing of large aluminium parts through friction-induced heat. This study investigates the deformation and microstructural evolution of two friction stir deposited aluminium alloys: AlMg and Al-Mg-Sc-Zr. Both alloys were printed using a MELD machine with constant process parameters. To further analyze the recrystallization and recovery occurring during deposition, a quenching step was implemented at the end of the deposition. EBSD analyses revealed significant differences in microstructure between both alloys. The addition of Al₃(Sc, Zr) dispersoids resulted in a remarkable homogeneity of grain size and orientation throughout the depth of the prints with a much finer microstructure than that observed in the AlMg alloy which exhibited an increase in grain size with depth. These differences in microstructure indicated different recovery and/or recrystallization mechanisms while some signs of Continuous Dynamic Recrystallization (CDRX) were observed in both alloys.

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Al-Mg（-Sc-Zr）合金在搅拌摩擦沉积过程中的组织演变

添加剂搅拌摩擦沉积（AFSD）是一种新兴的固态增材制造工艺，可以通过摩擦引起的热来打印大型铝零件。研究了两种搅拌摩擦沉积铝合金AlMg和Al-Mg-Sc-Zr的变形和显微组织演变。这两种合金都是用恒定工艺参数的MELD机器打印的。为了进一步分析沉积过程中发生的再结晶和恢复，在沉积结束时进行了淬火步骤。EBSD分析显示两种合金的显微组织存在显著差异。Al3（Sc, Zr）分散体的加入使晶粒尺寸和取向在整个印痕深度上呈现出显著的均匀性，其显微组织比AlMg合金中观察到的晶粒尺寸随深度的增加而增加的组织细得多。这些显微组织的差异表明了不同的恢复和/或再结晶机制，并且在两种合金中观察到一些连续动态再结晶（CDRX）的迹象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.