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通过热处理工艺的调整获取了具有不同‘6-α’转化(即(Fe,Mn)Al_6相转化为α-Al_(12)(Fe,Mn)_3Si相)特征的Al-Mn-Mg合金初始试样,采用高分辨扫描电镜(SEM)对初始试样中‘6-α’的转化现象以及转化后α相的微观形貌特征进行了表征分析,并对各组试样进行热轧以研究该转化对形变过程中化合物破碎的影响。结果表明,‘6-α’转化有助于合金中粗大化合物的分裂和破碎,化合物破碎后会在进一步的形变过程中随基体流动进而改善其自身的分布状态,相对含量的多少以及疏松多孔的内部结构是α相帮助化合物充分破碎的关键因素。
Al-Mn-Mg alloys with different characteristics of 6-α transformation (ie transformation of (Fe, Mn) Al 6 phase into α-Al 12 (Fe, Mn) 3 Si phase) were obtained through the adjustment of heat treatment process In this paper, the transformation of ’6-α’ in the initial sample and the microstructure of α phase after transformation were characterized by high resolution scanning electron microscope (SEM), and the samples in each group were hot-rolled to study the Effect of Transformation on Compound Breakage during Deformation. The results show that the ’6-α’ transformation contributes to the fragmentation and fragmentation of the coarse compounds in the alloy. After the compound is crushed, the compound will flow with the matrix during the further deformation to improve its own distribution, the relative content and the loose porous The internal structure is a key factor in the alpha phase to help the compound to be fully broken.