Journal
MATERIALS LETTERS
Volume 300, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2021.130188
Keywords
Metals and alloys; Metal forming and shaping; Microstructure
Funding
- Natural Science Foundation of China [51975439]
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Experiments were conducted to analyze the effects of cold stretching and compression on the strength and ductility of extruded Al-Cu-Mg-Si alloy. The alloy with cold stretching showed higher strength but lower ductility, while the alloy without cold deformation exhibited higher ductility but lower strength.
To improve strength and ductility, a series of experiments were designed and carried out to systematically and quantitatively analyze extruded Al-Cu-Mg-Si alloy without cold deformation (E0%) and with 4% cold stretching/ compression (ET4%/EC4%) prior to artificial ageing. The main aim is to investigate the different effects of cold stretching and compression on strength and ductility of extruded alloy. Compared to E0%, the EC4% alloy had finer phase 0, higher dislocation density, larger contact angle of Cu-rich phases so that had higher strength and lower ductility. Compared to EC4% alloy, the ET4% alloy had more proportion of phase 0 ', smaller contact angle of Cu-rich phases, which made ET4% alloy higher strength and higher ductility.
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