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Notch Effects on Impact Tensile Properties in A6061-T6 Aluminum Alloy

机译:缺口对A6061-T6铝合金冲击拉伸性能的影响

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摘要

The strain rate sensitivity of a A6061-T6 aluminum is examined as a function of triaxial stress. The triaxial stress state is changed by changing the notch acuity of notched specimens. Under the high strain rate conditions, increasing triaxiality increases flow stress. Plastic constraint factor decreases in notched specimens under high strain rate conditions. Reduction-of-area in notched specimen increases with increasing strain rate. The relaxation of plastic constraint takes place under high strain rate in the notched specimens. The effects of triaxial stress and strain rate on the fracture surfaces are discussed.
机译:检查了A6061-T6铝的应变速率敏感性与三轴应力的关系。三轴应力状态通过改变缺口试样的缺口强度而改变。在高应变率条件下,增加三轴度会增加流动应力。在高应变速率条件下,带缺口试样的塑性约束因子降低。缺口样品的面积减小随应变率的增加而增加。缺口试样在高应变速率下发生塑性约束的松弛。讨论了三轴应力和应变率对断裂表面的影响。

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