Tensile properties and microstructure of rheo-diecast 7075 alloy prepared by serpentine channel process
| Autor: | Wen-zhi Zhu, Wei-min Mao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
business.product_category
Materials science serpentine channel Alloy microstructure chemistry.chemical_element 02 engineering and technology engineering.material 01 natural sciences lcsh:Technology rheo-die casting Aluminium lcsh:Manufactures 0103 physical sciences Ultimate tensile strength Materials Chemistry Composite material 010302 applied physics Plunger tensile properties lcsh:T Metals and Alloys 021001 nanoscience & nanotechnology Microstructure chemistry engineering Slurry Die (manufacturing) 7075 aluminum alloy Elongation 0210 nano-technology business lcsh:TS1-2301 |
| Zdroj: | China Foundry, Vol 16, Iss 3, Pp 161-167 (2019) |
| ISSN: | 1672-6421 |
| Popis: | A semisolid slurry of 7075 aluminum alloy was prepared by means of a serpentine channel process (SCP) and rheo-diecasting. The influences of pouring temperature during slurry preparation, the injection pressure and die preheat temperature on the mechanical properties and microstructure of a rheo-diecast 7075 aluminum alloy were investigated. The results show that the as-cast strength and elongation of the tensile samples were 210-260 MPa and 0.2%-1.7%, respectively, with an injection pressure of 130 MPa, a pouring temperature of 700-720 ºC, a preheat temperature of 280-350 ºC, and a plunger speed of 0.5 m·s-1. The results also show that the aged strength and elongation of the tensile samples were 420-453 MPa and 1.0%-1.4%, respectively, when the alloy solution was treated at 470 ºC for 12 h and aged at 120 ºC for 24 h. The substantial shrinkage porosity in the 7075 aluminum alloy tensile samples was the main cause of low elongation. |
| Databáze: | OpenAIRE |
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