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针对2124铝合金在人工时效、蠕变时效和预变形后蠕变时效3种不同状态下的力学性能与微观组织,研究了强化相的析出行为。结果表明,蠕变时效试样的力学性能比人工时效试样的明显下降,其中屈服强度下降了14%,抗拉强度下降了6.2%,伸长率下降了21%。而有形变的蠕变时效试样的力学性能则有明显改善,并接近人工时效试样的。此外,研究了2124铝合金蠕变时效过程中析出位向效应的形成与抑制机理,其关键在于位错的影响。
Aimed at the mechanical properties and microstructure of 2124 aluminum alloy in three different states of artificial aging, creep aging and pre-deformation creep aging, the precipitation behavior of the reinforced phase was studied. The results show that the mechanical properties of creep-aged specimens are significantly lower than those of artificial aging specimens, in which the yield strength decreases by 14%, the tensile strength decreases by 6.2% and the elongation decreases by 21%. However, the mechanical properties of the deformable creep-aged specimens are significantly improved, and close to the artificial aging specimens. In addition, the mechanism of formation and inhibition mechanism of 2124 aluminum alloy creep-aging process was studied, the key lies in the influence of dislocation.