铝合金微通道扁管EBSD晶粒度和织构分析  

Grain size and texture analysis of aluminum multi-pipe extrusion tube by electron backscattered diffraction technique

作　　者：范晓慧[1] 唐鼎[1] 方文利[1] 李大永[1] 彭颖红[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《塑性工程学报》2015年第1期51-54,共4页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51105249);国家科技支撑计划资助项目(2012BAF01B06);教育部优选基金资助项目(20120073130010)

摘　　要：采用电子背散射衍射(EBSD)技术,研究经高温大挤压比成形的AA3003铝合金微通道扁管横纵截面的晶粒分布、晶粒度统计和择优取向。结果表明,铝合金扁管的横截面和纵截面晶粒均呈等轴状,椭圆的长短轴比均约1.7左右。横截面平均晶粒尺寸约34.4μm,纵截面的平均晶粒尺寸约41.2μm。扁管沿挤压方向未观察到挤压变形带和焊合线。此外,铝合金微通道扁管织构为弱立方织构(100)[001]混合沿着挤压方向强高斯织构(110)[001]。并且经过高温严重塑性变形铝合金的微通道扁管的组织为再结晶组织,晶粒呈椭球状,顺着挤压方向略有拉伸,并生成典型铝合金再结晶织构。Grain morphology, the distribution and statistic of grain size and texture of AA3003 aluminum MPE （Multi-Port Ex-trusion） tube were investigated in the cross-section and longitudinal section by electro backscattered diffraction （EBSD） tech-nique. The results show that grains in both sections are recrystallized and equiaxed with the aspect ratio around 1.7. The averagegrain diameter of AA3003 MPE tube in the cross-section is about 34. 4μm, while that along the extrusion direction （El）） is about41.2μm. No deformation bands and welding lines are found in the tube. Texture of the aluminum tube is dominated by a cube-o-rientation （100）[001] with strong scatter about ED towards Goss （110）[001], which are classic recrystallization textures.

关 键 词：铝合金挤压 微通道扁管 电子背散射衍射 晶粒尺寸 织构 

分 类 号：TG379[金属学及工艺—金属压力加工]