铝-镁合金5A06在瞬态热冲击条件下的力学性能研究

通过热强度试验,测试并确定航空航天材料在复杂高速热冲击条件下的强度极限等关键参数,对于航空航天材料和结构的可靠性评定、寿命预测以及高速飞行器的安全设计具有重要的意义。针对强度设计手册中没有航空航天材料在高速热冲击环境下的强度极限等表征参数的现状,使用自行研制的高速飞行器瞬态气动热试验模拟系统,对铝-镁合金材料5A06在多种不同的瞬态热冲击条件下,进行气动加热模拟与热载联合试验研究,得到在瞬态热、力学环境的共同作用下铝-镁合金5A06材料的强度极限、承载时间等力学性能变化状况。为研究分析航空航天材料和结构在高速热冲击环境下的承载能力和结构减重提供了可靠依据。

A Study on Mechanical Properties of 5A06 Al-Mg Alloy at Transient Heating

Using thermal strength experiment to test and determine the pivotal parameters such as ultimate strength and thermal stress at the complicated condition of transient heating is very important for reliability estimation,life prediction of aerospace materials and security design of high-speed flight vehicle.There are no ultimate strength and other important token parameters at high temperature transient heating environment in the intensity design handbook yet.In this paper,the high temperature ultimate strength,loading time and other mechanical properties of 5A06 Al-Mg alloy under different transient heating temperatures and load environments were obtained by using experimental simulation system of the transient aerodynamic heating for high-speed flight vehicle.Reliable basis is provided for studying the loading capacity and weight lightened of aerospace materials and structures under transient heating environment.