I would not recommend it. I worked for 8 years as an automotive resistance-welding engineer responsible for body integrity. All of the big three spent millions of dollars on NDT research in hopes of finding a QA method that would eliminate body teardowns.
Guess what? Today, they are still doing physical body teardowns. The closest method was UT, but it is EXTREMELY sensitive and takes a super expert to interpret. The big problem comes with zinc-coated materials. If a process is too cold, what I used to call a "stick weld" usually occurred. In such a weld, just the zinc layer would bond, and there was no weld nugget. It would pass an x-ray and especially a UT NDT test, but break in two if just dropped on the floor.
Now, maybe if you are talking about non-coated materials there is some hope, but I would only suggest having a good consulting lab do this work, and destructive tear downs would still be required to establish some kind of "good/bad" calibration standard.
If it were I, I would just sacrifice a few of the parts and do the teardown and be done with it.
I know of a case where one of the big three had a resistance weld process go out of whack. Since the welds were suspect, the liability was high, and there was no NDT method to verify, they just decided to scrap a whole days production! Yes it happened! They scrapped 200 new cars with window stickers waiting to go out from the shipping lot!