XIE Ruo-ze, ZHANG Fang-ju, DENG Zhi-fang, et al. Experimental investigation into dynamic compressive mechanical properties of LY12 at high strain rates and high temperatures[J]. 2009, 24(4).
XIE Ruo-ze, ZHANG Fang-ju, DENG Zhi-fang, et al. Experimental investigation into dynamic compressive mechanical properties of LY12 at high strain rates and high temperatures[J]. 2009, 24(4).DOI:
The dynamic mechanical properties of LY12 aluminum were studied experimentally by Hopkinson Bar of diameter 5mm with an automatic assembling system and heating system
within the range of temperature from 20℃ to 400℃ and strain-rate from 5×103s-1 to 1.4×104s-1.In the experiments
a shaper was used to eliminate the oscillation of high frequency in the incident signal and to improve the experimental precision of bar system.The experimental results show that the effect of temperature on dynamic properties of LY12 is not great at temperature lower than 200℃;on the contrary
the thermal softening effect is obvious at temperature higher than 200℃
exhibiting the decrease of flow stresses and linear harden modulus with increase of temperature
which is similar to linear harden materials.From the experiments
the dynamic properties of LY12 don't show strong sensitivity to the strain rates.