Alloy Elements Optimization of High Strength Al alloy Plate for Automobile
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摘要: 在挤压态5754铝合金高强汽车板中添加不同含量的合金元素钒和锶, 并进行了拉伸性能和热疲劳性能的测试与分析。结果表明, 添加钒和锶有助于改善汽车板的拉伸性能和热疲劳性能。钒和锶的含量分别优选为0.6%、0.4%。与不添加钒元素相比, 添加0.6%钒的汽车板抗拉强度和屈服强度分别增大16%、43%, 主裂纹平均宽度和平均深度分别减小36%、35%。与不添加锶元素相比, 添加0.4%锶的含钒汽车板抗拉强度和屈服强度分别增大8%、17%, 主裂纹平均宽度和平均深度分别减小73%、65%。Abstract: The extruded 5754 aluminum alloy high strength plate specimens for automobile with various contents of alloying elements vanadium and strontium had been used to carry out tensile and thermal fatigue tests.The results show that vanadium and strontium additions could improve the tensile properties and thermal fatigue property of the plates.The optimized content of alloying elements vanadium and strontium was 0.6% and 0.4%,respectively. Compared with the plate without vanadium,the tensile strength and yield strength of the plate with vanadium of 0.6% increased by 16% and 43%,and the average width and length of main crack decreased by 36% and 35%,respectively.Compared with the plate containing vanadium without strontium,the tensile strength and yield strength of the plate with strontium of 0.4% increased by 8%and 17%,and the average width and length of main crack decreased by 73% and 65%,respectively.
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