Recently, China's leading magnesium alloy material manufacturer: ZKNJ, in cooperation with the Institute of Metal Research of the Chinese Academy of Sciences, has made important progress in the preparation of high-strength and high-corrosion-resistant magnesium alloy materials.
The joint research team used the multi-pass three-way compression technique to prepare the twin structure. Through the unique design of the compression path and the pass strain, the 12-pass low-strain and high-strain cyclic compression was used to successfully prepare the AZ80 magnesium alloy. The high-density twin structure with an average lamellar thickness of about 200 nanometers makes the average grain size refined from about 33 millimeters of the original material to 300 nanometers, and its tensile strength is as high as 469 MPa, which has been reported in this series of magnesium alloys. The strongest.
The team used the high-density ultra-fine twin structure to refine the grains, which not only avoided the adverse effects of non-equilibrium grain boundaries on corrosion resistance, but also significantly inhibited the occurrence of local corrosion, reducing the corrosion rate by an order of magnitude.