(1. 昆明理工大學(xué) 材料科學(xué)與工程學(xué)院，昆明 650093；
2. 云南省昆明冶金研究院 材料研究所，昆明 650031)
摘 要: 采用連續(xù)鑄軋方法制備6 mm厚、牌號為1235的鋁合金，利用高分辨透射電鏡(TEM)、掃描電鏡(SEM)和背散射電子衍射技術(shù)(EBSD)對鑄軋態(tài)(TRC)樣品的微觀結(jié)構(gòu)進行表征。結(jié)果表明：鑄軋態(tài)的1235鋁合金具有快速凝固組織，即晶粒尺寸在30~100 nm之間的納米多晶組織，有沿( )晶面滑移的滑移帶和高密度位錯線等深度塑性變形組織，還有沿(100)晶面生長的再結(jié)晶組織；Fe和Si等摻雜元素固溶在基體Al中；在鑄軋態(tài)下晶粒直徑幾乎分布在20~50 μm之間，且產(chǎn)生的較強織構(gòu)有{210}á122？、{122}á210？和{210}á125？等，較弱的織構(gòu)有銅織構(gòu){112}á111？和{112}á110？。
關(guān)鍵字: 1235鋁合金；連續(xù)鑄軋；微觀結(jié)構(gòu)；高分辨透射電鏡；電子背散射衍射；織構(gòu)
（1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology,
Kunming 650093, China
2. Materials Research Institute, Kunming Metallurgy Research Institute, Kunming 650031, China）
Abstract:The microstructures of 6 mm-thick 1235 aluminum alloy sheets produced by twin roll casting (TRC) were investigated by high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and backscattered electron diffractometry (EBSD). The results show that there are rapidly solidified microstructures with nano-polycrystalline grains ranging in 30-100 nm, severe plastic deformation structures sliding bands along ( ) direction, high density dislocation lines and recrystallized microstructures growing along (100) direction in the sheets. Additive elements, such as Fe and Si, exist in Al solid solution. In casting state, grain diameter almost evenly distributes in 20-50 μm; in the sheets produced by TRC, there are dominating textures, such as {210}á122？, {122}á210？ and {210}á125？, and secondary textures, such as copper texture {112}á111？ and {112}á110？ .
Key words: 1235 aluminum alloy; twin roll casting(TRC); microstructure; high-resolution transmission electron microscopy; backscattered electron diffraction(EBSD); texture
