Preparation method for low rare earth nanometer magnesium alloy with high thermal stability
A technology of high thermal stability and nano-magnesium, which is applied in the field of preparation of high-thermal-stability nano-magnesium alloys, can solve the problems of grain growth and poor thermal stability of nanostructured materials, and achieve the effect of increasing dislocation density
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Embodiment 1
[0015] The atomic percentage composition of the magnesium alloy used is Mg-1.36Gd-1.03Y-0.13Zr, and the alloy bar is subjected to swaging deformation at 100 °C, and the deformation of each pass is controlled to be 10%, 15%, and 15%, respectively, and the total deformation is 35%, the control feeding speed is 5mm / min, the feeding direction is changed after each pass of deformation, the swaging process is lubricated with oil, and the lubricant flow speed is 1.5m 3 / h, after swaging, anneal the obtained nano-magnesium alloy at 130°C for 20h.
[0016] The concentration of Gd and Y elements at the grain boundary of the obtained nano-magnesium alloy is 1.8 times that in the crystal, and the grain growth temperature of the obtained nano-magnesium alloy is 0.64T m .
Embodiment 2
[0018] The atomic percentage composition of the magnesium alloy used is Mg-1.09Gd-0.69Y-0.14Zr, and the alloy bar is subjected to swaging deformation at 150 °C, and the deformation of each pass is controlled to be 10%, 15%, 10%, and 10%, respectively. The amount of deformation is 38%, the feeding speed is controlled at 2mm / min, and the feeding direction is changed after each pass of deformation. The rotary forging process is lubricated with oil, and the flow speed of the lubricant is 1.5m 3 / h, the obtained nano-magnesium alloy was annealed at 120°C for 12h after swaging.
[0019] The concentration of Gd and Y elements at the grain boundary of the obtained nano-magnesium alloy is twice that in the crystal, and the grain growth temperature of the obtained nano-magnesium alloy is 0.64T m .
Embodiment 3
[0021] The atomic percentage composition of the magnesium alloy used is Mg-1.09Gd-0.69Y-0.14Zr, and the alloy bar is subjected to swaging deformation at 150°C, and the deformation of each pass is controlled to be 15%, 15%, 10%, and 10%, respectively. The amount of deformation is 41%, the feeding speed is controlled at 4mm / min, the feeding direction is changed after each pass of deformation, the swaging process is lubricated with oil, and the lubricant flow speed is 1.5m 3 / h, the obtained nano-magnesium alloy was annealed at 120°C for 12h after swaging.
[0022] The concentration of Gd and Y elements at the grain boundary of the obtained nano-magnesium alloy is twice that in the crystal, and the grain growth temperature of the obtained nano-magnesium alloy is 0.65T m .
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