Effects of Cu on the microstructures and tensile properties of thixoformed Al-Si alloys
In this study, the effects of copper content on the microstructures and tensile properties of thixoformed Al-5Si-xCu-0.5Fe (x =1.0, 2.0 and 3.0wt. %) were investigated. For this study, three different alloys having various amounts of copper were prepared using cooling slope casting before thixofo...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Trans Tech Publications, Switzerland
2015
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/14312/1/Effects_of_Cu_on_the_Microstructures_and_Tensile_Properties_of_Thixoformed_Al-Si_Alloys.pdf http://eprints.utem.edu.my/id/eprint/14312/ |
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| Summary: | In this study, the effects of copper content on the microstructures and tensile properties of
thixoformed Al-5Si-xCu-0.5Fe (x =1.0, 2.0 and 3.0wt. %) were investigated. For this study, three
different alloys having various amounts of copper were prepared using cooling slope casting before
thixoforming. The semi-solid liquid range for the alloys were estimated using the diffrential
scanning calorimetry (DSC) analysis. The samples were thixoformed at 40% liquid fraction. Some
of these samples were treated with a T6 aging process. The thixoformed and thixoformed T6
samples were then characterized by optical microscopy, scanning electron microscope (SEM) and
energy dispersive X-ray (EDX) as well as tensile tests. The different phases formed in the
thixoformed and thixoformed T6 samples were throughly investigated.The results indicate that as
copper content increases, the tensile strength also increases, which might due to precipitation
hardening. The thixoformed T6 alloys attained an ultimate tensile strength (UTS) as high as 303
MPa when Cu content is 3.0wt.%. |
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