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材料导报  2018, Vol. 32 Issue (18): 3181-3184    https://doi.org/10.11896/j.issn.1005-023X.2018.18.014
  金属与金属基复合材料 |
阳极氧化处理增强Al-Li合金胶接板剪切强度的机理
刘兆文1, 李毅波2,3, 黄明辉1,2,3, 汪必升3, 李剑3
1 中南大学轻合金研究院,长沙 410083;
2 中南大学高性能复杂制造国家重点实验室,长沙 410083;
3 中南大学机电工程学院,长沙 410083
The Mechanism of Strengthening Shear Strength of Al-Li Alloy Plates by Anodizing
LIU Zhaowen1, LI Yibo2,3, HUANG Minghui1,2,3, WANG Bisheng3, LI Jian3
1 Light Alloy Research Institute, Central South University, Changsha 410083;
2 State Key Laboratory of High Performance and Complex Manufacturing, Central South University, Changsha 410083;
3 College of Mechanical and Electrical Engineering, Central South University, Changsha 410083
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摘要 为揭示磷酸阳极氧化处理后Al-Li合金胶接接头剪切强度大幅度增强的机理,分别对其进行机械打磨和磷酸阳极化表面处理,并选用不同的分析仪器对表面处理后的Al-Li合金表面微观形貌、粗糙度、表面润湿性和表面自由能进行测试计算和分析。结果表明,机械打磨后仅在Al-Li合金表面留下纵横交错的沟槽,而磷酸阳极化处理后使得Al-Li合金表面产生了微观粗糙的多孔膜,增加了胶层与合金表面的接触面积,改善了胶质分布的均匀性;磷酸阳极化处理后Al-Li合金表面自由能明显提高,改善了粘接界面的润湿性能。两方面的共同作用,使得胶接界面的抗剪切能力大幅提高。
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刘兆文
李毅波
黄明辉
汪必升
李剑
关键词:  Al-Li合金  润湿性  磷酸阳极氧化  表面自由能    
Abstract: In order to reveal the mechanism of the greatly enhanced shear strength of the Al-Li alloy joints after phosphoric acid anodizing treatment, the Al-Li alloys were mechanical polished and anodized in phosphoric acid respectively. And different analytical instruments were used to analyze the Al-Li alloy surface, including micro-structure, roughness, surface wettability and surface free energy. The results showed that mechanical grinding was only leaved crisscrossed of grooves on the surface of the Al-Li alloy plate. However, the surface of the Al-Li alloy was appeared micro-roughened of porous membrane after the anodizing process in phosphoric acid, which increased the contact area between the adhesive layer and the alloy surface, as well as improved the uniformity of the adhesive distribution; the surface free energy of Al-Li alloy was improved obviously after phosphoric acid anodizing, which improved the wettability of the adhesion interface. The adhesion shear strength greatly increased for the co-effect of the two factors.
Key words:  Al-Li alloy    wettability    phosphoric acid anodizing    surface free energy
                    发布日期:  2018-10-18
ZTFLH:  TG491  
基金资助: 国家自然科学基金(51575535);中南大学创新驱动计划(2015CX002);湖南省科技厅项目(2014RS4056);高性能复杂制造国家重点实验室开放基金(zzyjkt2013-09B)
通讯作者:  李毅波:男,1981年生,博士,副教授,博士研究生导师,主要从事材料与构件一体化设计及制造等方面的研究 E-mail:yibo.li@csu.edu.cn   
作者简介:  刘兆文:男,1992年生,硕士研究生,主要从事铝合金材料胶接工艺与机理的研究 E-mail:478568306@qq.com
引用本文:    
刘兆文, 李毅波, 黄明辉, 汪必升, 李剑. 阳极氧化处理增强Al-Li合金胶接板剪切强度的机理[J]. 材料导报, 2018, 32(18): 3181-3184.
LIU Zhaowen, LI Yibo, HUANG Minghui, WANG Bisheng, LI Jian. The Mechanism of Strengthening Shear Strength of Al-Li Alloy Plates by Anodizing. Materials Reports, 2018, 32(18): 3181-3184.
链接本文:  
http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.18.014  或          http://www.mater-rep.com/CN/Y2018/V32/I18/3181
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