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所属单位：材料科学与技术学院
发表刊物：JOURNAL OF ADHESION
关键字：Aluminum and alloys destructive testing groove structures pre-treatment process surface roughness morphology tensile-shear strength
摘要：The forces between adhesive and adherend mainly influenced by the pre-treatment technology of the substrates have important effects on the bonding strength. In this paper, the influence of different pre-treatment processes and surface roughness on the tensile-shear strength of 2060 Al-Li alloy adhesive joints as well as related mechanism was investigated. In this perspective, substrates were processed by mechanical abrasion at different levels and by phosphoric acid anodizing, which resulted in different surface topographies that were characterized by means of roughness measurements. Single-lap joints were prepared using a two-component epoxy adhesive. The tensile-shear strength of joints was measured via destructive testing and the failure modes were analyzed to evaluate the quality of bonding. Results showed that with the increase of surface roughness of Al-Li alloy, the tensile-shear strength of the adhesive joints increased and the failure modes changed from interfacial failure to cohesive failure. The groove structures formed during mechanical abrading were regarded as being responsible for this strengthening behavior. Moreover, a rough porous membrane was produced on adherents' surface by phosphoric acid anodizing, causing a consolidation of adhesion at the adhesive-substrate interface.
ISSN号：0021-8464
是否译文：否
发表时间：2017-01-01
合写作者：Chen, Jicheng,Gu, Cheng,Peng, Qingyu,Chen, Jie,魏艳红
通讯作者：占小红