CAJ | 학술논문

采用连续铸轧方法制备6 mm厚、牌号为1235的铝合金，利用高分辨透射电镜(TEM)、扫描电镜(SEM)和背散射电子衍射技术(EBSD)对铸轧态(TRC)样品的微观结构进行表征。结果表明：铸轧态的1235铝合金具有快速凝固组织，即晶粒尺寸在30~100 nm之间的纳米多晶组织，有沿()晶面滑移的滑移带和高密度位错线等深度塑性变形组织，还有沿(100)晶面生长的再结晶组织；Fe和Si等掺杂元素固溶在基体Al中；在铸轧态下晶粒直径几乎分布在20~50μm之间，且产生的较强织构有{210}?122?、{122}?210?和{210}?125?等，较弱的织构有铜织构{112}?111?和{112}?110?。
채용련속주알방법제비6 mm후、패호위1235적려합금，이용고분변투사전경(TEM)、소묘전경(SEM)화배산사전자연사기술(EBSD)대주알태(TRC)양품적미관결구진행표정。결과표명：주알태적1235려합금구유쾌속응고조직，즉정립척촌재30~100 nm지간적납미다정조직，유연()정면활이적활이대화고밀도위착선등심도소성변형조직，환유연(100)정면생장적재결정조직；Fe화Si등참잡원소고용재기체Al중；재주알태하정립직경궤호분포재20~50μm지간，차산생적교강직구유{210}?122?、{122}?210?화{210}?125?등，교약적직구유동직구{112}?111?화{112}?110?。
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 20-50μm; in the sheets produced by TRC, there are dominating textures, such as {210}?122?, {122}?210? and {210}?125?, and secondary textures, such as copper texture {112}?111? and {112}?110? .