I was a welder for fun and profit, not asme or any other type cert. I was also 6 years in military USAF: worked big stuff, KC135 (Boeing 707's modified to refuel in-flight), B1-B bombers and B1 Bombers. while there are welds on them most all is rivets, usually some welded in landing gear parts pinions ect an oh ya those dang 1/4~1/2 turn things that would often not work for much even with a good snoopy wrench
I still have a pair or two of PINK under-ware as reminders for standing on a B4 stand arm pit deep in a airplane wing changing filters while
Hyd. Fluid ran down to the opening & my arm pits all way into you're boots... :x worse was when there was a-30 degree wind chill seems every thing waited to start to leak when the fluid finally warmed up but the actuators and lines were still cold... ahh those pleasant days working the flight line mid winter blizzard in Kansas... I do think there were/are some welds on some of the main heavy strut parts in the wing sweep system of the B1 and some of the main rib structure in one of the next gen fighters. I didn't work them read this in an in science Mag. most of these welds were in heavy alum, so might not been Mig could have been a TIG automatic robot? Way back then my welding experience was mostly Oxy Torch on Cars. I Like Mig welding (haven't done much in last year or four) been using a Buzz Box on the farm with 6010 & 7018 to repair broken cylinders and tractor parts and bucket rep..
Mark M
Mark