Microstructure evolution and solidification behaviors of A2017 alloy during cooling/stirring and rolling process

作者：Guan Ren guo^*; Zhao Zhan Yong; Chao Run ze; Feng Zhen xian; Liu Chun ming

来源：Transactions of Nonferrous Metals Society of China, 2012, 22(12): 2871-2876.

DOI：10.1016/S1003-6326(11)61544-6

• A2017 alloy
• semisolid
• sloping plate
• rolling
• microstructure
• microstructure evolution
• solidification

A novel semisolid rheo-rolling process of A2017 alloy was achieved by combining the shape rolling mill with the vibrating sloping plate device. The microstructure evolution and solidification behaviors during the process were investigated. The high cooling rate caused by the sloping plate and stirring action caused by the vibration and metal flow lead to a high nucleation rate as well as two primary grain growth patterns, direct globular growth as well as dendrite growth and subsequent breakage, which causes the formation of fine spherical or rosette primary grains. During the rolling process, the grains of the strip were elongated. The primary grain size of A2017 alloy strip increases with the increment of casting temperature. When the casting temperature was between 650 degrees C and 660 degrees C, A2017 alloy strip with good quality was produced by the proposed process. The microstructures of the strip are mainly composed of spherical or rosette grains.

• 出版日期2012-12
• 单位东北大学