Microstructural and textural gradients in SLM-manufactured AlSi10Mg after low-draught cold-rolling and heat treatment

Z. Liao, L Zhang, X. Huang*, D. Juul Jensen*

*Corresponding author for this work

Research output: Contribution to journalConference articleResearchpeer-review

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Abstract

Additively manufactured AlSi10Mg is often subject to a two-stage heat treatment, namely solid solution treatment followed by artificial aging, to achieve optimal properties. Before such heat treatments, slight surface plastic deformation may be applied to modify the surface quality and properties. However, gradients in microstructure and texture near the surface introduced by the plastic deformation may cause undesired microstructural and textural evolutions during subsequent heat treatment. In this work, we introduce plastic deformation in the surface layer in an SLM-manufactured AlSi10Mg sample by relatively low-draught cold rolling and we investigate the through-thickness variations in microstructure and texture in the deformed state and after heat treatment. The SLM-manufactured AlSi10Mg sample has a fine-scale microstructure and a weak texture, and is rather thermally stable during subsequent heat treatments. Applying 10% low-draught cold rolling to the SLM-manufactured AlSi10Mg sample is found to introduce a near Goss texture in the surface layer, while little change is observed in the center layer. After subsequent solution treatment and aging, abnormal grain growth occurred in the surface layer resulting in remarkable through thickness gradients in microstructure and texture.
Original languageEnglish
Article number012038
Book seriesJournal of Physics: Conference Series
Volume2635
Issue number1
Number of pages8
ISSN1742-6588
DOIs
Publication statusPublished - 2023
Event8th International Conference on Recrystallization and Grain Growth - Chongqing, China
Duration: 15 May 202319 May 2023

Conference

Conference8th International Conference on Recrystallization and Grain Growth
Country/TerritoryChina
CityChongqing
Period15/05/202319/05/2023

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