形变模式对3104铝合金板微取向流变行为的影响  

Effects of rolling mode on flow behavior of local texture of 3104 aluminum alloy sheets

作　　者：胡卓超[1] 张德芬[1] 刘沿东[1] 左良[1] 王福[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《材料科学与工艺》2005年第1期12-15,共4页Materials Science and Technology

基　　金：国家重点基础研究发展规划资助项目(G1999064908).

摘　　要：探讨了不同形变模式(同步轧制、异步轧制和双向异步轧制)对3104铝合金板微取向流变的影响.对各主要冷轧织构组分:Brass({110}<112>)、S({123}<634>)、R/S({124}<211>)、Goss({110}<001>)和copper({112}<111>),在三维取向空间的取向密度ω(g)沿板厚的分布进行了定量测定.结果表明:同步轧制时,各层织构组分取向密度呈对称分布;异步轧制与双向异步轧制时,各织构组分与传统的同步轧制的织构组分相同,只是表层各织构组分的强度级别明显提高,沿着轧板的厚度方向呈非对称分布;双向异步轧制下,除各层的织构组分取向密度略有变化外,基本与异步轧制相同.这种巨大的差异,主要是由于异步轧制时,搓轧区剪切应力的大小和方向不同,造成金属微取向流变行为的差异所致.Hot rolled 3104 Aluminum alloy sheet was cold rolled from 2.3mm to 0. 23mm, by conventional rolling, cross shear rolling and two direction cross shear rolling with a roll mismatch speed ratio 1. 17. Textures distribution through the thickness after conventional rolling, cross shear rolling and two direction cross shear rolling were studied by X - ray diffraction technique ( ODF analysis) . The results showed that the main rolling texture components in cross shear rolling and two direction cross shear rolling is similar to that obtained by conventional one, including Copper-{112} <111 > , Brass-{110} <112> , R/S - {124} <211 > and S-{123} <634 > . Orientation densities ω(g) of main texture components in different layer of conventional rolling have small exchange. Large difference of Orientation densities ω(g) of main texture components existed between the slow roller side and the fast roller in cross shear rolling. For the cross shear rolling, with increase of thickness, the Orientation densities ω(g) showed the near - linear increase, it caused by shear stress during the slow roller side and the fast roller. For the two direction cross shear rolling, there was the different tendency of change for ω(g) though the thickness, ω(g) of main texture components have a little change from the slow roller side (t=0.25) and the fast roller (t=0.75).

关 键 词：轧制 织构 铝合金板 形变 冷轧 板厚 金属 组分 流变行为 取向 

分 类 号：TB535[理学—物理] TG142[理学—声学]