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2E12鋁合金在冷軋和退火過程中織構和顯微組織的演變
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更新時間：2015-08-25
采用取向分布函數(ODF)和背散射電子衍射技術(EBSD)研究冷軋和退火對2E12鋁合金織構的影響，并采用透射電鏡(TEM)分析亞結構在冷軋與退火過程的演變規(guī)律。
2E12鋁合金在冷軋和退火過程中織構和顯微組織的演變Evolution of texture and microstructure of 2E12 aluminum
alloy during cold rolling and annealing
采用取向分布函數(ODF)和背散射電子衍射技術(EBSD)研究冷軋和退火對2E12鋁合金織構的影響，并采用透射電鏡(TEM)分析亞結構在冷軋與退火過程的演變規(guī)律。結果表明：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(Brass){011}á211？和S型織構{123}á634？逐漸增多，立方織構(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(Cube){001}á100？成為主要取向，其體積分數為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合金的立方織構體積分數增大。
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.
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