The invention discloses a method for improving the high-temperature
creep resistance of rare-earth-containing
magnesium alloy by virtue of anomalous twin crystals. According to the method, the rare-earth containing
magnesium alloy is subjected to predeformation treatment in the direction forming a 15-75-degree angle with the normal direction of a
base plane at 25-300 DEG C, the true strain amount is 0.001-0.1, {10-12} anomalous twin crystals are prearranged in the rare-earth-containing
magnesium alloy through deformation, the rare-earth-containing
magnesium alloy with the prearranged anomalous twin crystals and rare-earth-containing
magnesium alloy without prearranged anomalous twin crystals are subjected to stretching or compression
creep property testing correspondingly within the temperature range from 200 to 350 DEG C, compared with the rare-earth-containing
magnesium alloy without anomalous twin crystals, the rare-earth-containing magnesium alloy with the anomalous twin crystals has the advantages that the
creep stain is obviously reduced, the steady-state
creep rate is obviously lowered, and the creep resistance of is remarkably improved under the equal service conditions. The process which is reasonable in design, low in
equipment requirement, convenient to operate, low in cost, high in efficiency and capable of stably improving the high-temperature creep resistance of the rare-earth-containing magnesium alloy is provided.