The evolution of microstructure and properties of a new Al-Mn alloy ingot during homogenization treatment was researched by differential scanning calorimetry (DSC), optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), as well as measurement of hardness and conductivity test, respectively. The results show that both the conductivity and the hardness of Al-Mn alloy ingot decrease with the increase of temperature in the range of 560-620°C or the extension of holding time in the range of 12-72 h, but hardness at 620°C is higher than that at 600°C. The cast alloy is composed of dendrite segregation and non-equilibrium phase. The precipitated phases gradually dissolve and become spherical, and the dispersity of precipitates within the grains increases with increasing homogenization temperature and holding time. The reasonable homogenization condition for the studied alloy is 600°C and 24 h.
|Number of pages||7|
|Journal||Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals|
|Publication status||Published - Jan 1 2014|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Metals and Alloys
- Materials Chemistry