四川轻化工大学学报（自然科学版）2025，Vol.38Issue(2)：17-25,9.DOI:10.11863/j.suse.2025.02.03
低温冲击下2024-T351铝合金动态力学性能与能量演化
Dynamic Mechanical Properties and Energy Evolution of 2024-T351 Aluminum Alloy Under Cryogenic Impact
摘要
Abstract
2024-T351 aluminum alloy materials used in aerospace service are often exposed to impact loading in low-temperature environments.In order to investigate the dynamic mechanical properties and energy evolution law of 2024-T351 aluminum alloy under low-temperature and high strain rate coupled loading,tensile experiments are conducted on 2024-T351 aluminum alloy in a wide strain rate range(10-3～103 s-1)and a wide temperature range(-100～20℃)utilizing the MTS809 testing machine,the split Hopkinson tension bar and the low-temperature environmental system.At the same time,the recovered fractures are observed and analyzed by the scanning electron microscope(SEM).The results show that under quasi-static loading,the 2024-T351 aluminum alloy exhibits different degrees of temperature sensitivity in different temperature zones.The yield strength of the material at-100℃is increased by 11.08%compared with that at-60℃,and the yield strength of the material at-60℃is increased by 3.67%compared with that at-20℃,and the yield strength of the material at-20℃is increased by 1.49%compared with that at 20℃.Moreover,under impact loading,the 2024-T351 aluminum alloy shows a temperature-strain rate coupling effect,in which the strain rate sensitivity of the material decreases with the decrease of temperature.The SEM results show that the material presents different fracture patterns at different strain rates and temperatures.Meanwhile,from the energy perspective,the dynamic fracture process of 2024-T351 is associated with energy accumulation,dissipation and release,and the dissipation energy increases with the decrease of temperature and the increase of strain rate.关键词
2024-T351铝合金/低温/冲击/能量演化/断裂模式Key words
2024-T351 aluminum alloy/low-temperature/impact loading/energy evolution/fracture patterns分类
数理科学引用本文复制引用
潘志波,朱志武..低温冲击下2024-T351铝合金动态力学性能与能量演化[J].四川轻化工大学学报（自然科学版）,2025,38(2):17-25,9.基金项目
四川省自然科学基金项目(2022NSFSC0420) （2022NSFSC0420）
