Dissimilar friction welding of 6061-T6 aluminum and AISI 1018 steel: Properties and microstructural characterization
Dissimilar friction welding of 6061-T6 aluminum and AISI 1018 steel: Properties and microstructural characterization
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DOI：
10.1016/j.matdes.2009.12.010
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发表时间：
2010-05-01
影响因子：
8.4
通讯作者：
Lippold, John C.
中科院分区：
文献类型：
--
作者：
Taban, Emel;Gould, Jerry E.;Lippold, John C.
异种材料的连接在广泛的工业应用中越来越受到关注。特别是汽车行业，将异种材料连接视为实现轻质材料的途径。具体而言，将铝合金部件引入钢制车身需要开发可靠、高效和经济的连接工艺。由于铝和钢表现出不同的物理、机械和冶金特性，因此识别适当的焊接工艺和实践可能是有问题的。在这项工作中，惯性摩擦焊接已被用于创建之间的6061-T6铝合金和AISI 1018钢使用各种参数的接头。通过力学试验和金相分析对接头进行了评价。使用金相学、显微硬度测试、扫描电子显微镜（SEM）、能量色散谱（EDS）、X射线元素绘图、具有超高分辨率SEM的聚焦离子束（FIB）和透射电子显微镜（TEM）在TEM和STEM模式下进行显微组织分析。这些分析的结果首先表明可以实现250 MPa量级的接头强度。此外，在接头铝侧的塑化层中观察到失效。此外，结合线的特征在于形成的Al-Fe金属间化合物的薄层。该金属间化合物层平均约250 nm厚，并且在组成上似乎与FeAl和Fe 2Al 5相相关。(C)2009爱思唯尔有限公司保留所有权利。
Joining of dissimilar materials is of increasing interest for a wide range of industrial applications. The automotive industry, in particular, views dissimilar materials joining as a gateway for the implementation of lightweight materials. Specifically, the introduction of aluminum alloy parts into a steel car body requires the development of reliable, efficient and economic joining processes. Since aluminum and steel demonstrate different physical, mechanical and metallurgical properties, identification of proper welding processes and practices can be problematic. In this work, inertia friction welding has been used to create joints between a 6061-T6 aluminum alloy and a AISI 1018 steel using various parameters. The joints were evaluated by mechanical testing and metallurgical analysis. Microstructural analyses were done using metallography, microhardness testing, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray elemental mapping, focused ion beam (FIB) with ultra high resolution SEM and transmission electron microscopy (TEM) in TEM and STEM modes. Results of these analysis first suggested that joint strengths on the order of 250 MPa could be achieved. In addition, failures were seen in the plasticized layer on the aluminum side of the joint. Further, bond lines were characterized by a thin layer of formed Al-Fe intermetallic. This intermetallic layer averaged roughly 250 nm thick and compositionally appears related to the FeAl and Fe2Al5 phases. (C) 2009 Elsevier Ltd. All rights reserved.