Electron beam welding of Ti-15-3 titanium alloy to 304 stainless steel with copper interlayer sheet
来源期刊：中国有色金属学报(英文版)2010年第10期
论文作者：王廷 张秉刚 陈国庆 冯吉才
文章页码：1829 - 1834
Key words：Ti-15-3 titanium alloy; 304 stainless steel; electron beam welding; intermetallics layer; mechanical properties
Abstract: Electron beam welding of Ti-15-3 titanium alloy to 304 stainless steel with a copper sheet as interlayer was carried out. Microstructures of the joint were studied by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). In addition, the mechanical properties of the joint were evaluated by tensile test and the microhardness was measured. These two alloys were successfully welded by adding copper transition layer into the weld. Solid solution with a certain thickness was located at the interfaces between weld and base metal in both sides. Regions inside the weld and near the stainless steel were characterized by solid solution of copper with TiFe2 intermetallics dispersedly distributed in it. While weld near titanium alloy contained Ti-Cu and Ti-Fe-Cu intermetallics layer, in which the hardness of weld came to the highest value. Brittle fracture occurred in the intermetallics layer when the joint was stretched.
