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制备了2种含有相近合金元素含量但不同的弥散第二相密度的铝锰合金冷轧板材。利用背散射电子衍射和取向成像图技术研究了晶粒分裂和微观织构,使用X射线衍射技术测量了宏观织构。研究发现当应变达到3左右时,高密度的小尺寸弥散相会促进铜型和S型织构的形成,同时增加了大角晶界所占比例。在小应变下,弥散相对织构和大角晶界的影响不显著。研究显示弥散相通过钉扎晶界从而促进织构演化,进而影响晶粒分裂和大角晶界的形成。
Two kinds of cold-rolled aluminum-manganese alloy sheets with similar second phase density and different alloying element contents were prepared. Grain splitting and microstructure were studied by backscattered electron diffraction and oriented imaging techniques. Macroscopic textures were measured by X-ray diffraction. It is found that when the strain reaches about 3, the high density of small size disperse phase promotes the formation of copper and S texture, and increases the proportion of large-angle grain boundaries. At small strain, the effect of dispersion on relative texture and large-angle grain boundaries is insignificant. Studies have shown that the dispersed phase through the pinning grain boundaries to promote the evolution of the texture, thereby affecting the grain size and grain boundary formation.