Effect of various multi-stage solution treatments on the microstructure and properties of cold-extruded Al–9.74Zn–2.59 Mg–0.94Cu–0.2Zr–0.83Ti alloy
Source abstract
Abstract
Herein, the microstructure and properties of cold-extruded Al–9.74Zn–2.59Mg–0.94Cu–0.2Zr–0.83Ti aluminum alloys after three different multi-stage solution treatments were investigated. Upon increasing the multi-stage solution treatment temperature and holding time, the grain size of the alloy gradually increase and the number of undissolved phases gradually decreased. After peak aging, many dislocations and sparse precipitates were observed in the three-stage solution treated alloy, and a high precipitate density was obtained in the alloys after multi-stage solution treatment, where the precipitates were mainly η (metastable MgZn2), η (stable MgZn2) phase, and a (Guinier Preston zone) GP zone. The precipitate-free zone (PFZ) of the multi-stage solution treated alloys expanded, with semi-continuous grain boundary precipitates (GBPs) distributed at grain boundaries. Upon increasing the solution temperature and holding time, the hardness, tensile strength, and elongation of the alloy first increased and then decreased, and the corrosion resistance of the alloy gradually increased.Graphical abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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