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Effect of magnesium on microstructure and properties of Cu-Cr alloy
- Source :
- Journal of Alloys and Compounds. 752:191-197
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Magnesium was added into Cu-Cr alloy to overcome the traditional limitations of high-cost and large-scale manufacturing of Cu-Cr alloys and to unveil the acting mechanism of Mg on the microstructure and properties of Cu-Cr alloy. Effect of magnesium on microstructure and properties of Cu-Cr alloy has been investigated by means of hardness test, electrical conductivity measurement, transmission electron microscopy, three-dimension atom probe tomography technique and X-ray diffraction analysis. The precipitation sequence of Cu-Cr-Mg alloy was similar with that of binary Cu-Cr alloy. Additional magnesium in Cu-Cr alloy accelerated the process of precipitates nucleation, restrained the growth of the precipitates by segregating along precipitates surface during aging. This enhanced the stability of the deformation microstructure and improved the mechanical properties of the alloy. Cu-Cr-Mg alloy showed a better comprehensive properties and softening resistance performance than Cu-Cr alloy at elevated temperature. After aged at 480 °C, Cu-Cr-Mg alloy had a tensile strength of 540 MPa and an electrical conductivity of 79.2 %IACS for the peak aging states, and it still maintained a tensile strength of 515 MPa and an electrical conductivity of 80.8 %IACS after 4 h aging.
- Subjects :
- Materials science
Alloy
Nucleation
chemistry.chemical_element
02 engineering and technology
Atom probe
engineering.material
01 natural sciences
law.invention
law
0103 physical sciences
Ultimate tensile strength
Materials Chemistry
Composite material
010302 applied physics
Precipitation (chemistry)
Magnesium
Mechanical Engineering
Metals and Alloys
021001 nanoscience & nanotechnology
Microstructure
chemistry
Mechanics of Materials
Vickers hardness test
engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 09258388
- Volume :
- 752
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........92416f8f2a1075fab62596f2416c0ab2