期刊
MATERIALIA
卷 7, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtla.2019.100387
关键词
Additive friction stir-deposition; Severe plastic deformation (SPD); Atom probe tomography; Dynamic recrystallization; Microindentation
资金
- US Department of Defense Strategic Environmental Research and Development Program [WP18-C4-1323]
- Alabama Transportation Institute (ATI)
This research provides the first description of the process parameter relationship to the microstructure/nanostructure and mechanical properties of Aluminum Alloy 6061 AFS-D deposits. The solid-state, additive friction stir-deposition, process provides a new path for coating, joining, and additively manufacturing materials with high deposition rates (20-30 lb/hour) while avoiding liquid-solid phase transformation defects. As-deposited samples revealed the AFS-D process reduced the average grain size by an order of magnitude over a range of processing conditions. Transmission Electron Microscopy (TEM) and Atom Probe Tomography (APT) analysis established beta '' precipitates were dissolved by the AFS-D process and re-precipitated as Mg-Si solute clusters.
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