摘要:
采用搅拌摩擦加工方法,成功将金属钒粉高效地添加到铸态AZ81母体镁合金中,制备出电子电气用新型含钒镁合金,并进行显微组织、物相组成、微观织构和力学性能的测试与分析。结果表明:新型合金晶粒细小,由α-Mg基体相和少量的Mg17Al12相、Al3V相组成。与铸态AZ81母体镁合金相比,该新型含钒镁合金内部显微织构明显弱化、力学性能明显提高,织构Max值降低30%,抗拉强度提高27%,屈服强度提高60%,断后伸长率提高82%,断裂方式从混合断裂变为韧性断裂。
Abstract:
A new type of magnesium alloy containing vanadium was prepared with the vanadium powder effectively added into the cast AZ81 parent magnesium alloy by friction stir processing,and the microstructure,phase composition,micro-texture and mechanical properties of the alloy were tested and analyzed. The results show that the new-typed alloy is with tiny grain and composed of α-Mg matrix and a small quantity of the Mg17Al12 and Al3V phase. Compared with the parent magnesium alloy,the internal microstructure of the new-typed magnesium alloy containing vanadium is obviously weakened with significantly improved mechanical properties. The maximum of texture of the new-typed magnesium alloy is decreased by 30%,and the tensile strength,yield strength and elongation after fracture of the alloy can be increased by 27%,60% and 82%,respectively. Moreover,the fracture mode of the new-typed alloy changes from mixed fracture to ductile fracture.
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