1991 Volume 9 Issue 4 Pages 550-555
This study developed the new Transient Liquid Insert Metal Diffusion Bonding (TLIM-bonding) technique using alloying powder whose chemical compositions were similar to those of base metal. The base metals used were commercial Ni-base superalloys such as MM007, MarM247 and Inconel 713C alloys. They were bonded with both a Ni-15%Cr-4%B amorphous insert metal and IN100 alloying powder sheet with the thickness of about 250 μm.
In the case of a MM007 alloy, the times required for completion of isothermal solidification and sequent homogenizing process were about 0.6 ks and 86.4 ks at 1423 K, respectively using this technique even with the bonding clearance of about 100 μm. The former time was about 1/80 and the latter time was about 1/30 compare to the times obtained by a conventional TLIM bonding. The short period during homogenizing process may be due to element diffusion from alloying powder to base metal by three-dimensional diffusion process.
The tensile strength of MM007, MarM247 and Inconel 713C joints at 1255 K were almost equal to those of each base metal, respectively.
From the experimental results, it should be useful to insert alloying powder to a wide bonding clearance joint during TLIM-bonding in fabrication