T6热处理工艺对泡沫铝夹芯板压缩性能的影响

Effect of T6 heat treatment process on compressive properties of aluminum foam sandwich panels

已经制备成型的泡沫铝夹芯板无法通过改变界面结合方式、芯层宏观结构等方法来优化性能,可通过热处理来改变泡沫铝芯层的微观结构,从而改善夹芯板的力学性能。本研究采用L9(34)正交试验探究T6热处理的固溶时间、固溶温度、时效温度、时效时间对泡沫铝夹芯板压缩性能的影响。试验结果表明,固溶温度大于510℃,固溶时间为4 h时会显著改变芯层泡壁的微观结构。最佳的热处理工艺是510℃固溶处理4 h,165℃时效处理8 h,可使夹芯板坍塌强度提高27%,吸能效率提高22%。本研究的结论可供工业化生产借鉴。

The pre⁃formed foam aluminum sandwich panel cannot be optimized in terms of performance by changing interface bonding methods,the macrostructure of the core layer,and other methods,while the microstructure of the aluminum foam core layer can be modified by T6 heat treatment to improve the mechanical properties of the sandwich panel.An L9(34)orthogonal experiment was conducted to explore the effects of solution treatment time,solu⁃tion treatment temperature,aging temperature,and aging time of T6 heat treatment on the compression properties of the aluminum foam sandwich panels.The experimental results show that the microstructure of the core layer foam wall can be significantly changed when the solution treatment temperature is higher than 510℃and the solution treatment time is 4 h.The optimal heat treatment process is found to be a 510℃solution treatment for 4 h,fol⁃lowed by an aging treatment at 165℃for 8 h.This process increases the slump strength of the sandwich panel by 27%and the energy absorption efficiency by 22%.The conclusions of this study can be used for reference for industrial production.