Effects of minor Y, Zr and Er addition on microstructure and properties of Al-5Cu-0.4Mn alloy
| Autor: | Ting-biao Guo, Li Qinglin, Chen Wang, Wan-wu Ding, Qi Li, Feng Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
microstructure Alloy 02 engineering and technology engineering.material lcsh:Technology 01 natural sciences lcsh:Manufactures Phase (matter) 0103 physical sciences Ultimate tensile strength Materials Chemistry Composite material T6 heat treatment 010302 applied physics lcsh:T Precipitation (chemistry) Metals and Alloys Al-Cu-Mn alloy 021001 nanoscience & nanotechnology Microstructure engineering Elongation 0210 nano-technology Dispersion (chemistry) lcsh:TS1-2301 Brittle fracture |
| Zdroj: | China Foundry, Vol 14, Iss 6, Pp 461-468 (2017) |
| ISSN: | 2365-9459 1672-6421 |
| DOI: | 10.1007/s41230-017-6130-2 |
| Popis: | The effect of different contents of Y, Zr and Er on microstructure and properties of Al-5Cu-0.4Mn alloy was investigated. T6 heat treatment, OM, SEM and EDS methods were applied to the alloy. The results showed that fluidity and elongation of alloy adding Y, Zr and Er were improved, while with the increase of addition amounts, θ phase increased and grains were trended to grow up gradually. The Al-5Cu-0.4Mn alloy presented the maxed style of ductile and brittle fracture. After T6 heat treatment, the precipitation amounts of θ phase decreased dramatically and tensile strength and hardness significantly increased. Especially when addition contents were among 0.1-0.3wt.%, tensile strength and hardness of heat-treated alloy increased greatly, almost doubled as that of the as-cast state. The tensile strength reached its maximum of 378.43 MPa when the addition amount was 0.3wt.%. With the further increase of addition amounts, the elongation deteriorated and the proportion of ductile fracture reduced due to the limited dispersion strengthening effect of θ phase and Al8Cu4Er. It demonstrated that addition of 0.1-0.3wt.% Y, Zr and Er would generate positive effects and influences on Al-5Cu-0.4Mn alloy, which is significant for optimizing components and improving properties of Al-5Cu-0.4Mn alloy. |
| Databáze: | OpenAIRE |
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