Constitutive equations of high strength aluminum alloy sheet 7B04-T6 under warm tension
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摘要: 通过在293~573K的温度范围内和应变速率为0.0006~0.06s-1下对高强度铝合金7B04-T6薄板进行温拉伸试验,研究了高强度铝合金温拉伸性能,以及该合金在升温条件下流变应力与变形温度、应变速率之间的关系,可以得出结论:合金的流动应力随温度的升高而降低,随应变速率的升高而升高;延伸率随变形温度的升高而增大,随应变速率的增大而减小,并基于Fields and Backofen方程建立了该型铝合金在温拉伸时应力-应变模型.Abstract: Warm tensile tests for high strength aluminum alloy 7B04-T6 sheet were held at condition of elevated temperature and different strain rates. The range of temperature is 293~573K and the strain rate is 0.0006~0.06s-1. The warm tensile properties, relation between temperature, strain rate and the flow stress were discussed. It is concluded that flow stress decline with the increase of temperature and the decrease of strain rates; Elongation percentage increase with the increase of temperature and the decrease of strain rates. Furthermore constitutive equations under warm tension were obtained based on Fields and Backofen equation.
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Key words:
- high strength aluminum alloy /
- warm tension /
- constitutive equation
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