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通过在293—773K的温度范围内和应变速率为0.001—0.1 s-1下对7022铝合金薄板进行温拉伸试验,研究了7022铝合金温拉伸性能,以及该合金在升温条件下流变应力与变形温度和应变速率之间的关系。并利用改进了的Hooke law和Grosman方程建立了7022铝合金在温拉伸时应力-应变本构模型。研究结果表明:7022铝合金的流变应力随温度的升高而降低,随应变速率的升高而升高;温拉伸试样的延伸率随变形温度的升高而升高,随应变速率的增大而减小。
The hot tensile properties of 7022 aluminum alloy were studied by means of the temperature tensile test at the temperature range of 293-773K and the strain rate of 0.001-0.1 s-1. The tensile properties of the 7022 aluminum alloy were studied, and the rheological stress Relationship with deformation temperature and strain rate. Based on the improved Hooke law and Grosman equation, the stress-strain constitutive model of 7022 aluminum alloy at elevated temperature is established. The results show that the flow stress of 7022 aluminum alloy decreases with the increase of temperature and increases with the increase of strain rate. The elongation of specimen increases with the increase of deformation temperature. With the increase of strain rate Increase and decrease.