Friction and Wear Behavior of CNTs/5A06 Aluminum Matrix Composite Prepared by Rotational Friction Extrusion Method
摘 要
添加体积分数3%碳纳米管(CNTs),应用旋转摩擦挤压(RFE)法制备了CNTs/5A06铝基复合材料,研究了其显微组织、显微硬度和耐磨性能,并与RFE加工前后5A06铝合金的进行了对比。结果表明:RFE加工后铝合金组织由RFE加工前的粗大长条状晶粒变为细小等轴晶,但显微硬度增幅不明显,复合材料的晶粒进一步细化,硬度明显增加;RFE加工对铝合金摩擦因数与磨损率的影响较小,复合材料的摩擦因数与磨损率则分别比RFE加工前铝合金的降低了17.6%,34.7%;复合材料磨损表面光滑完整,存在塑性变形和少量犁沟,磨损机制为表面塑性变形和轻微的磨粒磨损,RFE加工前后铝合金的磨损表面均存在较多凹坑和犁沟,磨损机制为黏着磨损和磨粒磨损。
Abstract
5A06 aluminum matrix composite reinforced with 3vol% carbon nanotubes (CNTs) was fabricated by rotational friction extrusion (RFE) method. The microstructure, microhardness and wear resistance of the composite were investigated and compared with those of 5A06 aluminum alloy before and after RFE processing. The results show that the microstructure of the aluminum alloy changed from coarse long-strip-like grains before RFE processing to fine equiaxed grains after RFE processing, but the increase range of the microhardness was small. The grains in the composite were further refined and the hardness increased obviously. The RFE processing had little influence on the friction factor and wear loss rate of the aluminum alloy. The friction factor and wear loss rate of the composite decreased by 17.6% and 34.7% that of the aluminum alloy before RFE processing, respectively. The worn surface of the composite was smooth and complete with plastic deformation and less ploughing; the wear mechanism was surface plastic deformation and slight abrasive wear. The worn surface of the aluminum alloy before and after RFE processing had relatively more grooves and ploughing; the wear mechanism was adhesion wear and abrasive wear.
中图分类号 TB331 DOI 10.11973/jxgccl201904015
所属栏目 材料性能及应用
基金项目 国家自然科学基金资助项目(51364037);江西省自然科学基金资助项目(20171BAB206004)
收稿日期 2018/3/21
修改稿日期 2019/3/15
网络出版日期
作者单位点击查看
备注聂文君(1992-),男,江西吉安人,硕士研究生
引用该论文: NIE Wenjun,XING Li,LIU Fencheng,KE Liming,FAN Hao. Friction and Wear Behavior of CNTs/5A06 Aluminum Matrix Composite Prepared by Rotational Friction Extrusion Method[J]. Materials for mechancial engineering, 2019, 43(4): 69~72
聂文君,邢丽,刘奋成,柯黎明,樊浩. 旋转摩擦挤压法制备CNTs/5A06铝基复合材料的摩擦磨损行为[J]. 机械工程材料, 2019, 43(4): 69~72
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【5】黄科辉, 柯黎明, 邢丽, 等. 旋转摩擦挤压合金化法制备Al3Ti金属间化合物[J]. 稀有金属材料与工程, 2011, 40(10):1812-1816.
【6】邢丽, 倪圆苹, 徐卫平, 等. 基于旋转摩擦挤压法制备CNTs/Al复合材料的显微组织[J]. 中国有色金属学报, 2017, 27(10):2012-2019.
【7】丁志鹏, 张孝彬, 许国良, 等. 碳纳米管/铝基复合材料的制备及摩擦性能研究[J]. 浙江大学学报(工学版), 2005, 39(11):1811-1815.
【8】OMIDI M, KHODABANDEH A, NATEGH S, et al. Wear mechanisms maps of CNT reinforced Al6061 nanocomposites treated by cryomilling and mechanical milling[J]. Tribology International, 2017, 110:151-160.
【9】PÉREZ-BUSTAMANTE R, BUENO-ESCOBEDO J L, JIMÉNEZ-LOBATO J, et al. Wear behavior in Al2024-CNTs composites synthesized by mechanical alloying[J]. Wear, 2012, 292/293:169-175.
【10】樊浩, 邢丽, 叶寅, 等. 旋转摩擦挤压制备MWCNTs/Al复合材料的组织及磨损性能[J].材料工程,2016,44(10):47-53.
【11】王承剑, 黄春平, 夏春, 等. PTFE含量对FSP制备Ni/Al复合材料组织和性能的影响[J]. 中国有色金属学报, 2017, 27(9):1810-1815.
【12】胡赓祥, 钱苗根. 金属学[M]. 上海:上海科学技术出版社, 1980:328-330.
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【14】王振廷, 孟君晟. 摩擦磨损与耐磨材料[M]. 哈尔滨:哈尔滨工业大学出版社, 2013.
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