Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
On the conjoint influence of heat treatment and lithium content on microstructure and mechanical properties of A380 aluminum alloy
Highlights T4 heat treatment and the addition of Li modify the microstructure of alloy. Heat treatment improves the tensile properties of non-modified and modified alloys. Fracture surfaces of modified specimens had more ductile dimples than base alloys.
Abstract In this study, the effects of a T4 heat treatment on the microstructure and tensile properties of an A380 aluminum alloy with and without lithium (Li) additions have been investigated. Microstructural examination was carried out using optical and scanning electron microscopy, image analysis, and X-ray diffraction (XRD) analysis methods. The results showed that when the T4 heat treatment was applied, spheroidized eutectic Si particles and fragmented β-phase particles were formed. The influence of the heat treatment on the aspect ratio and average length of Si and β phases in a non-modified alloy was more noticeable than in the Li-modified. Significant improvements in tensile properties were also observed in heat-treated samples. Additionally, a fractographical analysis showed that the fracture surfaces of the Li-modified specimens with and without heat treatment had more ductile dimple and fewer brittle cleavage surfaces.
On the conjoint influence of heat treatment and lithium content on microstructure and mechanical properties of A380 aluminum alloy
Highlights T4 heat treatment and the addition of Li modify the microstructure of alloy. Heat treatment improves the tensile properties of non-modified and modified alloys. Fracture surfaces of modified specimens had more ductile dimples than base alloys.
Abstract In this study, the effects of a T4 heat treatment on the microstructure and tensile properties of an A380 aluminum alloy with and without lithium (Li) additions have been investigated. Microstructural examination was carried out using optical and scanning electron microscopy, image analysis, and X-ray diffraction (XRD) analysis methods. The results showed that when the T4 heat treatment was applied, spheroidized eutectic Si particles and fragmented β-phase particles were formed. The influence of the heat treatment on the aspect ratio and average length of Si and β phases in a non-modified alloy was more noticeable than in the Li-modified. Significant improvements in tensile properties were also observed in heat-treated samples. Additionally, a fractographical analysis showed that the fracture surfaces of the Li-modified specimens with and without heat treatment had more ductile dimple and fewer brittle cleavage surfaces.
On the conjoint influence of heat treatment and lithium content on microstructure and mechanical properties of A380 aluminum alloy
Karamouz, Mostafa (Autor:in) / Azarbarmas, Mortaza (Autor:in) / Emamy, Masoud (Autor:in)
13.02.2014
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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