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Abstract
Discontinuous precipitation (DP) is a commonly observed mechanism by which solid solutions decompose. It results from layers of precipitate and solute depleted matrix forming across a moving boundary. The morphology of the discontinuous regions can be highly complex, and the way dislocations or twins navigate such a structure during deformation is poorly understood. Only through 3-dimensional (3D) analysis can the true morphology of discontinuous precipitation be revealed. This work presents the first 3D study of DP using a novel PFIB based serial sectioning method. The material studied is AZ80, an industrially important class of Mg-Al-Zn alloy where DP is commonly observed. The structure is revealed to consist of an interconnected network of DP regions within an interconnected matrix. The width of the DP regions show strong local variations. This structure is expected to be readily penetrated by twins and dislocations.
Original language | English |
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Article number | 115265 |
Journal | Scripta Materialia |
Volume | 227 |
Early online date | 4 Jan 2023 |
DOIs | |
Publication status | Published - 1 Apr 2023 |
Keywords
- Precipitation
- Magnesium alloys
- 3D reconstruction
Research Beacons, Institutes and Platforms
- Henry Royce Institute
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Dive into the research topics of 'Discontinuous precipitation in Mg-Al alloy studied in 3-dimensions'. Together they form a unique fingerprint.Projects
- 1 Finished
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LightForm: Embedding Materials Engineering in Manufacturing with Light Alloys
Prangnell, P. (PI), Curioni, M. (CoI), Haigh, S. (CoI), Quinta Da Fonseca, J. (CoI), Robson, J. (CoI), Shanthraj, P. (CoI) & Zhou, X. (CoI)
1/10/17 → 18/10/23
Project: Research