Microstructure Evolution and Mechanical Properties of Spray-deposited Al-21. 47Si-4. 73Fe-2. 5Cu-0. 9Mg Alloy

Al-Si-Fe-Cu-Mg alloy was prepared by spray deposition and was further processed by hot extrusion as well as T6 heat-treatment. The results indicate that the microstructure of the deposited alloy is composed of primary Si particles with average size of less than 5 μm, α-Al, Al2 CuMg, β-Al5 EeSi and δ...

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Published inJournal of iron and steel research, international Vol. 23; no. 1; pp. 14 - 18
Main Authors JIA, Yan-dong, CAO, Fu-yang, MA, Pan, LIU, Jing-shun, SUN, Jian-fei, WANG, Gang
Format Journal Article
LanguageEnglish
Published Singapore Elsevier Ltd 01.01.2016
Springer Singapore
Subjects
aging
Applied and Technical Physics
Engineering
hypereutectic Al-Si alloy
Machines
Manufacturing
Materials Engineering
Materials Science
mechanical property
Metallic Materials
microstructure
Physical Chemistry
Processes
spray deposition
mechanical property
spray deposition
microstructure
aging
hypereutectic Al-Si alloy
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Summary:Al-Si-Fe-Cu-Mg alloy was prepared by spray deposition and was further processed by hot extrusion as well as T6 heat-treatment. The results indicate that the microstructure of the deposited alloy is composed of primary Si particles with average size of less than 5 μm, α-Al, Al2 CuMg, β-Al5 EeSi and δ-Al4FeSi2 (rectangular shape), and no eutectic silicon is found due to the special solidification behavior. The age hardening curves reveal two peaks. The uniform ultimate tensile strength (UTS) and the elongation of the peak-aged Al-Si-Fe-Cu-Mg alloy are 468. 3 MPa, 0.61% at 298 K and 267.4 MPa, 6.42% at 573 K, respectively. The fracture surfaces display brittle fracture morphology at 298 K, whereas it varies to mixture of brittle and ductile failure with increasing the temperature.
ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(16)30004-8