轧制变形量对GNPs/Ti复合材料组织与性能的影响（英文）  

Effects of Hot-rolling Reduction on Microstructure and Mechanical Properties of GNPs/Ti Composites

作　　者：吴焰[1] 张洪梅[1] 才鸿年[1] 范群波[1] 穆啸楠 Wu Yan;Zhang Hongmei;Cai Hongnian;Fan Qunbo;Mu Xiaonan(National Key Laboratory of Science and Technology on Materials under Shock and Impact,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学冲击环境材料技术国家级重点实验室,北京100081

出　　处：《稀有金属材料与工程》2018年第8期2312-2317,共6页Rare Metal Materials and Engineering

摘　　要：采用放电等离子烧结技术(SPS)和热轧制备了石墨烯/钛基复合材料(GNPs/Ti)。重点研究了轧制变形量对GNPs/Ti复合材料的显微组织及力学性能的影响规律。采用扫描电镜观察不同变形量后的显微组织,结果显示,随着轧制变形量的增加,基体晶粒长径比增大,石墨烯取向性提高。拉伸结果表明,GNPs/Ti复合材料的抗拉强度和断后伸长率随着变形量的增加而增加,在变形60%时,最大抗拉强度达到680 MPa,相比纯钛提高了33%。采用轧制工艺可以使GNPs/Ti复合材料孔洞减少、GNPs分布具有取向性,从而提高材料的力学性能。Graphene nanoplatelets （GNPs）/Ti composites were fabricated by spark plasma sintering （SPS） and hot-rolling. This work was focused on the effects of rolling reduction on microstructure and mechanical properties of GNPs/Ti composites. The SEM microstructure results show that matrix grains are gradually elongated and the amount of GNPs along the rolling direction rises with the increase of rolling reduction. The tensile test results indicate that the ultimate tensile strength and fracture elongation of the GNPs/Ti composites increase with the increase of rolling reduction. The ultimate tensile strength of the composites at 60% rolling reduction is 680 MPa, which is increased by 33% compared with pure Ti. Hot-rolling process can relieve defects and lead to GNPs aligned along the rolling direction, which improves the tensile property.

关 键 词：石墨烯/钛基复合材料 轧制变形量 显微组织 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程] TG335.11[金属学及工艺—金属压力加工]