Microstructure and Property Evolution of Al-Zn-Mg-Cu Alloy with Ho Addition During Homogenization

被引：0
作者：
Wang Xiaoguo [1 ]
Ma Liyun [2 ,3 ]
机构：
[1] Shanxi Agr Univ, Coll Engn, Taigu 030801, Peoples R China
[2] Lvliang Univ, Dept Min Engn, Lvliang 033001, Peoples R China
[3] Jeonju Univ, Dept Mech & Automot Engn, Jeonju 55069, South Korea
来源：
RARE METAL MATERIALS AND ENGINEERING | 2021年 / 50卷 / 08期
关键词：
Al-Zn-Mg-Cu alloy with Ho addition; homogenization treatment; micro -hardness and electrical conductivity; homogenization kinetic analysis; MECHANICAL-PROPERTIES; MINOR SC; BEHAVIOR; ZR; RECRYSTALLIZATION; PRECIPITATION; ZIRCONIUM; STRENGTH;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Homogenization treatment for Al-Zn-Mg-Cu alloy with Ho addition was investigated by scanning electron microscope (SEM), optical microscope (OM), and differential scanning calorimeter (DSC). Electrical conductivity and micro -hardness were tested during different homogenization processes. The results show that there are four kinds of second phases in as-cast alloy: T (AlZnMgCu), Al7Cu2Fe, Al8Cu4Ho and S (Al2CuMg), which cause severe micro-segregation in microstructure. After homogenization treatment at 475 C for 20 h, T phase is completely dissolved back into matrix and no S phase is observed, with Al7Cu2Fe and Al8Cu4Ho remaining. Micro-hardness and electrical conductivity are associated with vibration of T phase, dissolution of which can increase micro-hardness and decrease electrical conductivity. Besides, precipitation of Al3Ho also contributes to the increase in both micro -hardness and electrical conductivity during homogenization at 475 degrees C for 5 similar to 20 h. Finally, through homogenization kinetic analysis, the appropriate homogenization parameter is determined as 470 similar to 475 degrees C120 similar to 25 h.
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收藏
页码：2771 / 2776
页数：6
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