Drastic improvement in dissimilar aluminum-to-steel joint strength by combining positive roles of silicon and nickel additions
Drastic improvement in dissimilar aluminum-to-steel joint strength by combining positive roles of silicon and nickel additions
复制标题
通过结合硅和镍添加物的积极作用，显着提高异种铝与钢的接头强度
DOI：
10.1016/j.matdes.2022.111444
复制
发表时间：
2023
影响因子：
8.4
通讯作者：
Y. Tatsumi
中科院分区：
文献类型：
--
作者：
K.T. Suzuki;S. Omura;S. Tokita;Y.S. Sato;Y. Tatsumi
铝（Al）合金与钢的异种焊接有望有效地减轻汽车车身的重量。在本研究中，采用钨气弧焊将铝合金1050板与含硅（Si） Al填料的镀镍（Ni） Fe板焊接在一起。系统地研究了同时添加Si和Ni对Al/Fe接头强度的影响与金属间化合物（IMC）层显微组织的关系。Si和Ni的加入分别通过Si的加入导致IMC层厚度的减少和Ni的加入导致IMC晶粒的细化来提高Al/Fe结合强度。同时添加Si和Ni对接头强度的提高最为有效。添加Si后，Al/Fe界面处的IMC层由θ-Fe4Al13、η-Fe2Al5和Al -Fe - Si三元IMC组成，添加Ni后变为θ-Fe4Al13、η-Fe2Al5和Al -Fe - Ni三元IMC。这种相的变化以及IMC层的减薄和晶粒细化可能有助于同时添加Si和Ni进一步提高接头强度。
Dissimilar welding of an aluminum (Al) alloy to steel is expected to be effective for weight reduction of automotive car bodies. In this study, an aluminum alloy 1050 sheet was welded to a nickel (Ni)-plated Fe sheet using a silicon (Si)-containing Al filler by gas tungsten arc welding. The effect of the simultaneous addition of Si and Ni on the Al/Fe joint strength associated with the microstructure of the intermetallic compound (IMC) layer was systematically examined. The addition of Si and Ni individually improved the Al/Fe joint strength by the reduction in the IMC layer thickness caused by the Si addition and the refinement of the IMC grains due to the Ni addition, respectively. The most effective improvement in the joint strength was achieved by the simultaneous addition of Si and Ni. The IMC layer at the Al/Fe interface with Si addition consisted of θ-Fe4Al13, η-Fe2Al5, and Al–Fe–Si ternary IMCs, while it changed to θ-Fe4Al13, η-Fe2Al5, and an Al–Fe–Ni ternary IMC after Ni was additionally added. This change in the phase as well as the thickness reduction and grain refinement of the IMC layer probably contributes to further improving the joint strength by the simultaneous addition of Si and Ni.