Abstract Electron beam welding of titanium alloy to mild steel with a transition joint prepared by explosively welding method was carried out. The interfacial structure of explosive weld and tensile strength of the joint were affected significantly by the distance between electron beam weld and explosive weld. When the electron beam weld was 1.5 mm away from the explosive weld, the explosive interface layer was liquefied during electron beam welding process, which was consisted of Fess, Fe + Fe2Ti eutectic, FeTi + Fe2Ti peritectic and Ti + Fe2Ti eutectic from the Fe side to the Ti side. When this distance increased to more than 3 mm, the thickness of interfacial intermetallic compounds in explosive weld decreased sharply from 40 μm to lower than 3 μm. The interface layer kept in solid state and diffusion of Ti and Fe atoms occurred across the interface. When the electron beam weld was located 6 mm away from the explosive weld, the maximum tensile strength of 418 MPa was obtained. In this case, the residual stress across the explosive interface induced by electron beam welding reached to the lowest value in this experiment.

中文翻译：

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后续EBW工艺下爆炸焊接钛/钢接头的界面演化

摘要 采用爆炸焊接法制备过渡接头钛合金与低碳钢的电子束焊接。爆炸焊缝的界面结构和接头的抗拉强度受电子束焊缝与爆炸焊缝间距的显着影响。当电子束焊缝距离爆炸焊缝 1.5 mm 时，爆炸界面层在电子束焊接过程中液化，从 Fe 侧开始由 Fess、Fe + Fe2Ti 共晶、FeTi + Fe2Ti 包晶和 Ti + Fe2Ti 共晶组成到 Ti 一侧。当该距离增加到 3 mm 以上时，爆炸焊缝界面金属间化合物的厚度从 40 μm 急剧下降到 3 μm 以下。界面层保持固态，Ti 和 Fe 原子在界面上发生扩散。当电子束焊缝距离爆炸焊缝 6 mm 时，获得的最大抗拉强度为 418 MPa。在这种情况下，电子束焊接引起的爆炸界面上的残余应力达到了本实验的最低值。