Microstructures and mechanical properties of electron beam welded titanium alloy to stainless steel joints with different filler metals
Electron beam welding experiments of titanium alloy to stainless steel was carried out with Ni, V, Ag, and Cu filler metals. Microstructures of the joints were examined by optical microscopy, scanning electron microscopy and X-ray diffraction analysis. Mechanical properties of the joints were evaluated according to tensile strengths and microhardness. The results showed that all the filler metals were helpful to restrain the Ti-Fe intermetallics formed in the joint. The welds with different filler metals were all characterized by solid solution and interfacial intermettlics. For every type of the filler metal, the kinds of solid solution and interfacial intermetallics were depended on the metallurgical reactions between the filler metal and base metals. The interfacial intermetallics were Fe2Ti+Ni3Ti+NiTi2, TiFe, Ti2Ag and Cu2Ti+CuTi+CuTi2 in the joints welded with Ni, V, Ag and Cu filler metals, respectively. The tensile strengths of the joints were primarily determined by the thickness and brittleness of the interfacial intermetallics. Of all, the highest tensile strength was obtained in the joint welded with silver filler metal, which is about 310 MPa.
Titanium alloy Stainless steel Electron beam welding, Microstructure Mechanical property
Binggang Zhang Ting Wang Houqin Wang Jicai Feng
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, 92 Xidazhi Str Key Laboratory of Special Welding Technology in Shandong Province, Harbin Institute of Technology at
国际会议
济南
英文
1-7
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）