Influence of Pre-Heat Treatment on the Deformation Behaviors, Microstructural Characteristics, and Mechanical Properties of a Continuously Cast Al-Cu-Mg Alloy during Continuous Extrusion Process.

Content Provider	Europe PMC
Author	Qin, Renbao Chen, Wentian Tang, Jie Jiang, Fulin Chen, Yonggang Zhang, Hui
Editor	Kovacheva, Daniela
Copyright Year	2023
Abstract	The presence of a second phase in Al-Cu-MG alloys, with various sizes and supersaturation-solid-solubility, which can be changed by pre-heat-treatment, could have remarkable influence on hot workability and mechanical performance. In the present work, a continuously cast 2024 Al alloy was homogenized and then subjected to hot compression and continuous extrusion (Conform) along with the initial as-cast alloy. The results showed that the 2024 Al alloy specimen with pre-heat treatment had a higher resistance to deformation and dynamic recovery (DRV) during hot compression process compared with the as-cast sample. Meanwhile, dynamic recrystallization (DRX) was advanced in the pre-heat-treated sample. After the Conform Process, the pre-heat-treated sample also attained better mechanical properties without additional solid solution treatment. The higher supersaturation solid solubility and dispersoids generated during pre-heat treatment was proved to play a key role in restricting boundary migration, tangling dislocation motion and promoting the precipitation of S phase, which raised resistance to DRV and plastic deformation and enhanced the mechanical properties.
Journal	Materials (Basel)
Volume Number	16
DOI	10.3390/ma16083042
PubMed Central reference number	PMC10145085
Issue Number	8
PubMed reference number	37109881
e-ISSN	19961944
Language	English
Publisher	Molecular Diversity Preservation International (MDPI)
Publisher Date	2023-04-12
Access Restriction	Open
Subject Keyword	Al-Cu-Mg alloy heat treatment deformation microstructure mechanical property
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science