Method for strengthening VW93M magnesium alloy through atomic segregation and atomic clustering
An atomic cluster, magnesium alloy technology, applied in the field of magnesium alloy strengthening, can solve problems such as low strength, increased strength of magnesium alloys, and difficulty in meeting demand
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Embodiment 1
[0011] The mass percentage composition of the magnesium alloy used is Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er, and the alloy bar is subjected to swaging deformation at 125°C, with a total deformation of 26%. The swaging process is lubricated with oil, Lubricant flow velocity is 1m 3 / h, control the feeding speed to 4mm / min, and change the feeding direction after each pass of deformation.
[0012] After swaging deformation, the concentration of Gd and Y elements in the grain boundary of the alloy is twice that in the grain, and the atomic cluster size is 5-7nm. The yield strength of the obtained alloy is 551MPa, the tensile strength is 613MPa, and the elongation after fracture is 5%.
Embodiment 2
[0014] The mass percentage composition of the magnesium alloy used is Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er. The alloy bar is subjected to swaging deformation at 150°C, with a total deformation of 35%. The swaging process is lubricated with oil. Lubricant flow velocity is 1m 3 / h, control the feeding speed to 5mm / min, and change the feeding direction after each pass of deformation.
[0015] After swaging deformation, the concentration of Gd and Y elements in the grain boundary of the alloy is 2.1 times that in the grain, and the atomic cluster size is 5-10nm. The yield strength of the obtained alloy is 542MPa, the tensile strength is 651MPa, and the elongation after fracture is 5%.
Embodiment 3
[0017] The mass percentage composition of the magnesium alloy used is Mg-8.0Gd-3.0Y-0.4Zr-0.05Ag-0.03Er, and the alloy bar is subjected to swaging deformation at 100°C, with a total deformation of 40%. The swaging process is lubricated with oil. Lubricant flow velocity is 1.5m 3 / h, control the feeding speed to 6mm / min, and change the feeding direction after each pass of deformation.
[0018] After swaging deformation, the concentration of Gd and Y elements in the grain boundary of the alloy is 2.5 times that in the grain, and the atomic cluster size is 6-10nm. The yield strength of the obtained alloy is 530MPa, the tensile strength is 620MPa, and the elongation after fracture is 7%.
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