Microstructure and Properties of New Automobile Magnesium Alloy Modified by Vanadium and Titanium
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摘要: 为了优化汽车用镁合金Mg-8Al-0.6Zn的质量和性能，进行了汽车用新型镁合金Mg-8Al-0.6Zn-xV-0.5Ti （x=0，0.1，0.5，0.8）试样的钒钛改性，并研究了不同钒含量下试样的组织和力学性能。结果表明：随着钒含量的加入，合金试样的平均晶粒尺寸逐渐变小，组织逐渐变致密、均匀，强度逐渐提高。当钒含量达到0.8%时，合金的平均晶粒尺寸最小，为16μm，抗拉强度和屈服强度达到最大值，分别为289、243 MPa，断后伸长率则为8.7%。因此，适当加入钒有益于改善汽车用新型镁合金Mg-8Al-0.6Zn-V-0.5Ti试样的综合性能。Abstract: In order to optimize the quality and properties of Mg-8Al-0.6Zn alloy for automobile,vanadium-titanium modification of Mg-8Al-0.6Zn-xV-0.5Ti(x=0,0.1,0.5,0.8) specimens was carried out,and the microstructure and mechanical properties of specimens with different vanadium content were tested and analyzed.The results show that with the increase of vanadium addition,the average grain size of the alloy decreases gradually,and the structure becomes dense and uniform with the strength increasing gradually.At 0.8% of the vanadium content,the average grain size of the alloy is the smallest at 16 μm with the tensile strength and yield strength of the alloy reaching to maximum of 289 MPa and 243 MPa respectively,and the elongation after fracture is 8.7%.Therefore,proper addition of vanadium is beneficial to improve the comprehensive properties of Mg-8Al-0.6Zn-xV-0.5Ti alloy for automobile.
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