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Development of al4.8   weight percentage copper alloy obtained from recycled aluminum cans designed for thixoforming process

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Document pages: 8 pages

Abstract: The focus of this work is to develop a new aluminum alloy containing 4.8 wt copper alloy obtained from the recovery aluminum tank designed for thixoforming process. After the alloy is melted and solidified in a permanent metal mold, the sample is subjected to solution heat treatment at 525 ° C for 2 to 5 times   h to 48   h, quenched in water, and then naturally aged. The results show the evolution of hardness. Therefore, the best condition for 24-hour solubilized solution heat treatment   h aging is to reach 190 ° C   h within 3 months. Using this data piece, thixoforging is carried out at 580 ° C and 615 ° C respectively, and the solid fraction () is 0.8 and 0.6 respectively. The optimized T6 tempering is adopted and the tensile test is carried out. The obtained mechanical properties are compatible with Wth those obtained for consolidated alloys processed in semisolid state (SS) and after T6 temper hardness increases from 95 HB to 122 HB and the best results were a tensile strength of 324 MPa ± 10 MPa, yield strength of 257 MPa ± 18 MPa, and an elongation of 7.1   ±  1 . For alloys designed for thixoforming process, these results are in accordance with what was expected whereas globular microstructure, high ductility, and good performance under cyclic conditions are desirable.

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