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Study on Microstructure and Mechanical Properties of Al-Li Based Alloys Processed by Extrusion
- Source :
- Journal of nanoscience and nanotechnology. 18(3)
- Publication Year :
- 2018
-
Abstract
- Aluminum and its alloys, due to their low density, high specific strength and high corrosion resistance amongst various structural materials, are used in a wide range of industrial applications for different aqueous solutions. In the present study, we studied effects of Ce addition on microstructure and mechanical properties of Al-2Li-1Cu-0.8Mg-0.1Zr alloys. The melt was held at 780 °C for 20 min and poured into a mold. And as-cast Al alloys were hot-extruded into a plate that was 4 mm in thickness with a reduction ratio of 14:1. The extruded plates were held at 540 °C for 4 hr in water quenching to solution treatment them. As-extruded Al-2Li-1Cu-0.8Mg-0.1Zr-xCe (x = 0.3, 0.6, 0.9 and 1.2 wt.%) alloys are composed of Al, AlLi, AlCuLi and Al11Ce3 phases. By increasing the Ce content from 0 to 1.2 wt.%, the Al11Ce3 phase is increased, after solution treatment the AlLi and AlCuLi phases are decreased. With increasing Ce addition from 0 to 1.2 wt.%, the average grain size of the as-extruded Al alloys were decreased slightly from 100.7, 113.74, 84.3, 74.7 and 61.7 μm and ultimate tensile strength was decreased slightly from 267.59, 264.92, 237.40, 220.93 and 207.83 MPa at room temperature. After solution treatment, ultimate tensile strength was measured with 205.13, 198.12, 195.50, 198.27 and 208.01 MPa at room temperature.
- Subjects :
- Quenching
Materials science
Biomedical Engineering
chemistry.chemical_element
Bioengineering
02 engineering and technology
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Microstructure
Grain size
Specific strength
020303 mechanical engineering & transports
0203 mechanical engineering
chemistry
Aluminium
Phase (matter)
Ultimate tensile strength
General Materials Science
Extrusion
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 15334880
- Volume :
- 18
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Journal of nanoscience and nanotechnology
- Accession number :
- edsair.doi.dedup.....84db176b9467b25e6d3fe1b9df3dd97d