Effects of homogenization treatment on the microstructure and mechanical properties of Mg-8Li-3Al-Y alloy

作者：Peng Q Z; Zhou H T^*; Zhong F H; Ding H B; Zhou X; Liu R R; Xie T; Peng Y

来源：MATERIALS & DESIGN, 2015, 66: 566-574.

DOI：10.1016/j.matdes.2014.03.046

• Magnesium alloy
• Homogenization
• Li loss
• Microstructure
• Mechanical property

The effects of homogenization treatment of Mg-8Li-3Al-Y alloy were investigated by optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and universal testing machine. The experiment results indicated that there existed five phases in the as-cast alloy: alpha, beta, Al2Y, AlLi and MgAlLi2. The spheroidized a phase grew gradually and its microstructure and composition became homogeneous when it was treated at 300 degrees C for 12 h. Meanwhile, the alloy has a good comprehensive mechanical property compared with other homogenization schedules. So, a homogenization treatment at 300 degrees C for 12 h was determined to be the optimal homogenization treatment for Mg-8Li-3Al-Y alloy.

• 单位
  中南大学