在应变速率为0.1、0.01、0.001 s-1和变形温度400、450、500 ℃条件下采用热模拟试验机对Al-11.5Si-1.6Mg-3.5Cu合金进行了等温热压缩试验,并采用动态材料模型(Dynamic Material Modeling,DMM)绘制材料的热加工图,预测了所设计的钎料合金Al-11.5Si-1.6Mg-3.5Cu与芯材铝合金AA3003的变形机制,从而得到钎料合金和芯材合金共同适合的加工窗口,避免复合轧制过程中出现材料开裂、变形不匹配等问题,缩短试验时间.试验结果表明,当变形温度在400～500 ℃,应变速率范围为0.001 s-1～0.1 s-1,Al-11.5Si-1.6Mg-3.5Cu合金与芯材合金AA3003在高温变形时不会出现失稳现象,并且在较高的温度和较低的应变速率下比较适合材料的成形加工.
Hot deformation behaviors and hot processing maps of Al-11.5Si-1.6Mg-3.5Cu and AA3003 alloys
In this study,the isothermal hot compression experiments of Al-11.5Si-1.6Mg-3.5Cu alloy were carried out at strain rates of 0.1 s-1,0.01 s-1,0.001 s-1 and deforma-tion temperatures of 400 ℃,450 ℃ and 500 ℃ on a thermal simulation testing machine.The dynamic material modeling(DMM)was used to draw the hot processing map of the ma-terial,and the deformation mechanism of the designed solder alloy Al-11.5Si-1.6Mg-3.5Cu and the core alloy AA3003 was predicted.Thus,the processing window suitable for the sold-er alloy and the core alloy is obtained,which avoids the problems of material cracking and mismatch of synergistic deformation during the composite rolling process,and saves the cost of experimental time.The experimental results show that when the deformation temperature is in the range of 400 ℃-500 ℃ and the strain rate is in the range of 0.001 s-1-0.1 s-1,the instability of Al-11.5Si-1.6Mg-3.5Cu alloy and core alloy AA3003 will not occur at high temperature,and it is more suitable for the forming process of materials at higher temperature and lower strain rate.
万方数据
维普
