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采用有限元软件Deform-3D对一种新型Al-Zn-Mg-Cu系高强铝合金进行了镦粗、拔长和镦拔连续变形实验研究,获得了变形体内部微观组织演变规律及应变分布规律。分析结果表明:相同锻比条件下,镦粗变形体内大部分区域的等效应变值在0.4～1.68之间,中心大变形区的组织以拉长晶粒为主,并有少许再结晶晶粒,其它区域的组织沿变形方向发生不同程度的变形;拔长变形体内大部分区域的等效应变值在0.74～1.96之间,组织均发生较剧烈变形,拉长的原始晶粒组织周围存在细小的再结晶新晶粒,等效应变值较高且变形更加均匀;总锻比相同的镦拔连续变形条件下,拔长分锻比大于镦粗分锻比时的等效应变较高,组织细小均匀。研究结果对实际生产有一定的指导意义。
A new type of Al-Zn-Mg-Cu high-strength aluminum alloy was subjected to upsetting, long-drawing and upsetting continuous deformation experiments using finite element software Deform-3D. The microstructure evolution and strain distribution of the deformed body were obtained . The analysis results show that under the same forging ratio, the equivalent strain values in most of the upsetting deformed bodies range from 0.4 to 1.68. The main deformation zones are dominated by elongated grains with a little recrystallized grains , And that of other regions varied in different degrees along the deformation direction. The equivalent strain values of most of the regions in the extended deformation ranged from 0.74 to 1.96, and the tissues tended to deform more drastically. There was a small deformation around the elongated original grain structure Of the new recrystallization grains, the equivalent strain value is higher and the deformation is more uniform; the same total forging continuous upsetting deformation conditions, the elongation forging ratio is greater than the upsetting forging ratio higher equivalent strain, the organization Small and uniform. The research results have some guiding significance to actual production.