Tantalum to Titanium Dissimilar Weld

By SWP

Date 10-07-2005 13:35

As you may already be aware, Ta and Ti are both easily welded materials. The question of welding Ta to Ti is interesting. I'm wondering about the application for this combination, why do you need to join these two metals? Also, what exactly do you mean by "the welds sound brittle", did you actually perform some type of destructive test? With regard to the actual metallurgy of the Ta/Ti weld, hopefully you'll get a response from a metallurgist that has experience with this.

By G.S.Crisi (****)

Date 10-07-2005 13:54

I suggest you to get in contact with the titanium great specialists, The Titanium Corp. of America:
www.timet.com
They're very kind people, willing to help those who need advice to weld titanium.
Giovanni S. Crisi
Sao Paulo - Brazil

By jimshay Date 10-07-2005 15:26

I have laser welded Ta to Ti and SEM analysis on fracture surface indicated that the weld is brittle. The brittlement might be caused by the shielding because Ta is very reactive at 343 C or above. Oxygen and nitrogen contamination might be the reason. I am still working on it and have made some progresses to solve the issue.