ECAP变形过程中MWCNTs/AZ31复合材料的织构演变  

Texture evolution of MWCNTs/AZ31 composite during ECAP

作　　者：周国华[1] 曾效舒[2] 余志核[1] 刘焱[1] 彭路南[1] 

机构地区：[1]宜春学院物理科学与工程技术学院,江西宜春336000 [2]南昌大学机电工程学院,江西南昌330031

出　　处：《锻压技术》2011年第6期120-124,共5页Forging & Stamping Technology

基　　金：江西省教育厅科技项目(GJJ09027)

摘　　要：采用等径角挤压变形工艺对经热挤压后的MWCNTs/AZ31复合材料进行不同道次的深度塑性变形。测试和分析了复合材料的室温力学性能,并利用X射线衍射仪对复合材料织构的演变进行了分析。研究结果表明:MWCNTs/AZ31复合材料经热挤压后具有较强的{0001}基面纤维织构,随着等径角挤压变形道次的增加,逐渐偏离挤压态的纤维织构分布,并且织构强度也逐渐减弱。MWCNTs/AZ31复合材料的室温力学性能受复合材料晶粒组织大小、织构分布等因素的综合影响。Multi-Walled Carbon Nonotubes（MWCNTs）/AZ31 composite was prepared for severe plastic deformation by means of equal channel angular pressing（ECAP） deformation process after hot extrusion.The mechanical properties were tested at room temperature.The texture evolution of composites was investigated by X-ray diffractometer（XRD） during ECAP.The results show that the MWCNTs/AZ31 composite has a strong {0001} fiber texture after hot extrusion.The distribution of texture gradually deviates from fiber texture with the increase of ECAP pass number,and the texture intensity gradually weakens.The grain size and texture together have an important role on the mechanical properties of MWCNTs/ AZ31 alloy composites at room temperature after ECAP.

关 键 词：多壁碳纳米管 复合材料 AZ31合金 等径角挤压 织构 力学性能 

分 类 号：TB33[一般工业技术—材料科学与工程]