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Effect of Sc on Microstructure and Properties of Al-8.5Zn-2.3Mg-2.4Cu Alloy
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Yirui CHENG1, Xiaohan SUN2, Yongdong HE1, Yikun ZHAO3, Yufeng DU4, Feilong LIANG5
Mining and Metallurgical Engineering | 2024, 44(5) : 142 - 147
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Mining and Metallurgical Engineering | 2024, 44(5): 142-147
• MATERIALS •
Effect of Sc on Microstructure and Properties of Al-8.5Zn-2.3Mg-2.4Cu Alloy
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Yirui CHENG1, Xiaohan SUN2, Yongdong HE1, Yikun ZHAO3, Yufeng DU4, Feilong LIANG5
Affiliations
  • 1.College of Materials Science and Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China
  • 2.Shandong Energy Digital Technology Co., Ltd., Jinan 250000, Shandong, China
  • 3.College of Physical Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, China
  • 4.Xinjiang Nongliushi Aluminum Co., Ltd., Wujiaqu 831300, Xinjiang, China
  • 5.Xinjiang Xiangrun New Materials Co., Ltd., Hami 839000, Xinjiang, China
Published: 2024-10-01 doi: 10.3969/j.issn.0253-6099.2024.05.029
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The effect of Sc on the microstructure and properties of Al-8.5Zn-2.3Mg-2.4Cu alloy was investigated. It is found that an addition of Sc can make the as-cast Al-Zn-Mg-Cu alloy with obviously smaller grain. As the Sc content (mass fraction) increases from 0 to 0.4%, the grain size of alloy decreases from 107.7 μm to 49.96 μm and the hardness increases from 116.8HV to 130.2HV. After hot-rolling process with large deformation quantity followed by 1 hour of solution heat treatment at 470 ℃, the Sc-containing alloy has higher dislocation density compared to the alloy without Sc addition, and the alloy with an addition of 0.4% Sc has a recrystallization rate dropped from 92.4% to 45.7% due to inhibition of its recrystallization behavior. After 24 hours of aging treatment at 120 ℃, the Al-Zn-Mg-Cu alloy with an addition of 0.4% Sc can be observed to have a large amount of spherical Al3Sc particles and short rod-like η′ (MgZn2) particles in dispersive distribution. Based on the plotted a crystal structure of Al3Sc-MgZn2 with coherent or semi-coherent interface with α (Al), it can be deduced that the Al3Sc particles provide heterogeneous nucleation sites for η′ (MgZn2) phase to promote its nucleation, which can promote precipitation hardening of the alloy.

microalloying  /  scandium  /  Al-Zn-Mg-Cu alloy  /  recrystallization  /  Al3Sc particle  /  heterogeneous nucleation site  /  precipitation hardening
Yirui CHENG, Xiaohan SUN, Yongdong HE, Yikun ZHAO, Yufeng DU, Feilong LIANG. Effect of Sc on Microstructure and Properties of Al-8.5Zn-2.3Mg-2.4Cu Alloy[J]. Mining and Metallurgical Engineering, 2024 , 44 (5) : 142 -147 . DOI: 10.3969/j.issn.0253-6099.2024.05.029
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Year 2024 volume 44 Issue 5
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doi: 10.3969/j.issn.0253-6099.2024.05.029
  • Receive Date：2024-04-14
  • Online Date：2026-03-17
  • Published：2024-10-01
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  • Received：2024-04-14
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Affiliations
    1.College of Materials Science and Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China
    2.Shandong Energy Digital Technology Co., Ltd., Jinan 250000, Shandong, China
    3.College of Physical Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, China
    4.Xinjiang Nongliushi Aluminum Co., Ltd., Wujiaqu 831300, Xinjiang, China
    5.Xinjiang Xiangrun New Materials Co., Ltd., Hami 839000, Xinjiang, China
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https://castjournals.cast.org.cn/joweb/kygczz/EN/10.3969/j.issn.0253-6099.2024.05.029
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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