MATEC Web Conf.
Volume 326, 2020The 17th International Conference on Aluminium Alloys 2020 (ICAA17)
|Number of page(s)||6|
|Section||Strength, Plastic Deformation & Formability|
|Published online||05 November 2020|
Study on Microstructure and Mechanical Properties of Al-Mg-Si-Cu Aluminium Alloy with High Ductility
1 Chinalco Materials Application Research Institute Co., Ltd., Suzhou Branch, Suzhou 215026, China
2 Chinalco Materials Application Research Institute Co., Ltd., Beijing 102209, China
3 Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
4 Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Beijing 100084, China
* Corresponding author: firstname.lastname@example.org
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 15~18%, 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-β” precipitates and high percentage of sub-grain boundary.
Key words: Microstructure / Mechanical Property / Al-Mg-Si-Cu Aluminum alloy / High Ductility
© The Authors, published by EDP Sciences, 2020
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