期刊
17TH INTERNATIONAL CONFERENCE ON ALUMINIUM ALLOYS 2020 (ICAA17)
卷 326, 期 -, 页码 -出版社
E D P SCIENCES
DOI: 10.1051/matecconf/202032603003
关键词
Microstructure; Mechanical Property; Al-Mg-Si-Cu Aluminum alloy; High Ductility
资金
- National Key Research and Development Program [2016YFB0101603]
A new type of Al-Mg-Si-Cu aluminium alloy with high ductility was studied in the present work. The microstructure features and mechanical properties of this alloy were systematically characterized by scanning electron microscopy (SEM), electron back-scatter Diffraction (EBSD), high resolution transmission electron microscopy (HRTEM) and tensile and fatigue test. The percentage of sub-grain boundary under forging and aging process reaches up to 72% which can be attributed to the suppression of recrystallization by the nano-sized AlMnCrSi dispersoids. The combination of mechanical properties of the new alloy product in aged state showed that the ductility keeps in the range of 15 similar to 18%, yield strength and tensile strength are 310MPa and 380MPa respectively, fatigue strength ranges from 130MPa to 135MPa. It presents more excellent properties than commercial 6061 alloy for the nano-sized AlMnCrSi dispersoids, initial-beta precipitates and high percentage of sub-grain boundary.
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