(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410083；
2. 中南大學(xué) 有色金屬材料科學(xué)與工程教育部重點(diǎn)實(shí)驗(yàn)室，長沙 410083)
摘 要: 采用取向分布函數(shù)(ODF)和背散射電子衍射技術(shù)(EBSD)研究冷軋和退火對(duì)2E12鋁合金織構(gòu)的影響，并采用透射電鏡(TEM)分析亞結(jié)構(gòu)在冷軋與退火過程的演變規(guī)律。結(jié)果表明：2E12合金熱軋板在冷變形過程中，隨著冷軋變形量從40%增加到80%，黃銅織構(gòu)(Brass){011}á211？和S型織構(gòu){123}á634？逐漸增多，立方織構(gòu)(Cube){001}á100？明顯減少。在退火過程中殘留的立方取向亞晶通過晶界遷移吞噬周圍的S取向亞晶而優(yōu)先長大。在470℃退火0.5h后，立方織構(gòu)(Cube){001}á100？成為主要取向，其體積分?jǐn)?shù)為36%。在相同的退火工藝條件下，隨著冷變形量的增加，退火后2E12合金的立方織構(gòu)體積分?jǐn)?shù)增大。
關(guān)鍵字: 2E12鋁合金；冷軋；退火；織構(gòu)；亞結(jié)構(gòu)
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education,
Central South University, Changsha 410083, China）
Abstract:The effects of cold rolling and annealing on textures of 2E12 aluminum alloy were investigated by means of orientation distribution function (ODF) and electron backscattered diffraction (EBSD). In addition, the evolution of substructure during cold rolling and annealing was analyzed by TEM. The results show that, with the increase of the deformation from 40% to 80%, main conclusions are presented as follow: Brass texture{011}á112？ and S texture {123}á634？ increase during the cold rolling, while cube texture {001}á100？ significantly reduces. In the annealing process, the residual cube sub-grains devour surrounding sub-grains of S orientation through the grain boundary migration and preferentially grow up. The cubic texture becomes major orientation and its volume fraction is 36% at 470 ℃ for 0.5 h. Under the same annealing process conditions, the volume fraction of recrystallization texture in the annealing alloy increases with the increase of the deformation.
Key words: 2E12 aluminum alloy; cold rolling; annealing; texture; substructure
