EBSD characterization of Al7075/graphene nanoplates/carbon nanotubes composites processed through post-deformation annealing  

EBSD表征变形后退火Al7075/石墨烯纳米片/碳纳米管复合材料

作　　者：Siavash IMANIAN GHAZANLOU Baitallah EGHBALI Roumen PETROV 

机构地区：[1]Faculty of Materials Engineering,Sahand University of Technology,P.O.Box:51335-1996,Tabriz,Iran [2]Department of Electromechanical Systems and Metal Engineering,Research Group Materials Science and Technology,Ghent University,Tech Lane Science Park Campus A,46,9062 Gent,Belgium [3]Department of Materials Science and Engineering,Delft University of Technology,Mekelweg 2,Delft,The Netherlands

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第8期2250-2263,共14页中国有色金属学报（英文版）

基　　金：the Sahand University of Technology and Ghent University for the support of this research。

摘　　要：The effects of the post-deformation annealing on the microstructural evolution of hot rolled Al7075 matrix composites reinforced with CNTs and GNPs were investigated.The multi-pass hot rolling was applied on the stir cast samples.Annealing was then applied to the composites at 450℃ for 4 h.Microstructural evolution was examined by SEM,EDS,and EBSD techniques.EBSD data showed that the addition of 0.87 vol.%(GNPs+CNTs)significantly inhibited the occurrence of recrystallization.Also,in the composite with 0.96 vol.%CNTs,recrystallization was partially inhibited.Whereas,in composites with 0.92 vol.%of GNPs,the occurrence of recrystallization through particle stimulated nucleation(PSN)mechanism was significantly accelerated.The volume fraction of recrystallized grains depends significantly on the occurrence of PSN in the presence of reinforcements.The intensity and type of the main components of the texture as well as the FCC fibers depend on the type of reinforcement.研究变形后退火对碳纳米管(CNTs)和石墨烯纳米片(GNPs)增强热轧Al7075基复合材料显微组织演变的影响。对搅拌铸造样品进行多道次热轧,然后在450℃下退火4 h。采用SEM、EDS和EBSD技术观察材料的显微组织演变。EBSD数据显示,添加体积分数(下同)为0.87%的GNPs和CNTs可明显抑制再结晶的发生。当添加0.96%的CNTs时,再结晶受到部分抑制。而当添加0.92%的GNPs时,明显加快了粒子激发形核(PSN)机制导致的再结晶。在有增强相存在的情况下,再结晶晶粒的体积分数与PSN的产生有显著的关系。主要织构的强度和类型都取决于增强相的种类。

关 键 词：ANNEALING COMPOSITE graphene nanoplates carbon nanotubes RECRYSTALLIZATION particle stimulated nucleation texture 

分 类 号：TB332[一般工业技术—材料科学与工程]