Electron beam welding of dissimilar metals

摘要: Thirty-three two-memeber combinations of dissimilar metals were electron beam welded as square-groove butt joints in 0.08 and 0.12 in. sheet material. Many ''braze welded'' by offsetting the about 0.02 from joint to achieve fusion lower melting point metal, but no significant other member pair. The welds evaluated visual metallographic examination, transverse tensile tests, bend tests. Ag/Al, Ag/Ni15Cr7Fe, Cu/Ni15Cr7Fe, Cu/V, Cu20Ni/Ni15Cr7Fe, Fe18Cr8Ni/Ni, Fe18Cr8Ni/Ni15Cr7Fe, Nb/Ti, Nb/V, Ni/Ni15Cr7Fe, Cb/V10Ti readily weld properties excellent. Others which had only minor defects included Ag/Cu20Ni, Ag/Ti, Ag/V, Cu/Fe18Cr8Ni, Cu/V10Ti, Cu20Ni/Fe18Cr8Ni, Ti/Zr2Sn welds. Cu/Ni deep undercut, was respects mechanical Ag/Fe18Cr8Ni poor, defect could probably be corrected. Difficulty with cracking experienced Al/Ni Fe18Cr8Ni/V welds, sound excellent properties. remaining Al-Cu, Al/Cu20Ni, Al/Fe18Cr8Ni, Al/Ni15Cr7Fe, Cu20Ni/V, Cu20Ni/V10Ti, Cb/Zr2Sn, Ni/Ti, Ni15Cr7Fe/V, Ni15Cr7Fe/V10Ti, Ti/V unsuccessful, due brittle phases, primarily at metal-base metal interface. In addition two-member specimens, several made buttering. Longitudinal weldmore » specimens three-member combination Al/Ni/Fe18Cr8Ni five Fe18Cr8Ni/V/Cb/Ti/Zr2Sn showed good strength satisfactory elongation. 6 tables, 16 figures.« less