About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
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Presentation Title |
L-48: Mechanical Properties and Microstructural Evolution of High-pressure Torsion-processed Al7068 Alloy |
Author(s) |
Juhee Oh, Sujung Son, Hyoung Seop Kim, Jae Bok Seol, Hyokyung Sung, Jung Gi Kim |
On-Site Speaker (Planned) |
Juhee Oh |
Abstract Scope |
The combination of severe plastic deformation, deformational heat, and frictional heat generated during the high-pressure torsion process has a great effect on microstructural evolutions including a grain refinement, dynamic recrystallization and recovery. In this study, the mechanical properties and microstructural evolution of high-pressure torsion-processed aluminum 7068 alloy at room temperature are investigated. In the early deformation stage, both grain refinement and nano-precipitates are formed that increase the strength of ultrafine-grained aluminum alloy, and maximum strength of 844 MPa was obtained at 5T. However, in the later deformation stage, strength decreases due to the grain growth, and coarse precipitates act as crack initiation sites during plastic deformation. This result shows severe plastic deformation of the HPT process positively contributes to the mechanical properties of the Aluminum alloy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Mechanical Properties, Other |