Welding 7075

Is There Any Tricks Or Ways To Weld 7075 Alum. I've Been Told That It Is Not Really Weldable I've Done A Little Welding On Blower Rotors And It Worked Ok. Just Wondering If There Is Any Info To Share On The Subject.

 

welding 2024 and 7075 is that both of these materials belong to a small group of aluminum alloys that are generally considered as being unweldable by the arc welding process. These materials are often found on aircraft, sporting equipment and other types of high-performance, safety-critical equipment and are not usually arc welded on the original component. Probably, the two most commonly found aluminum alloys within this category are 2024, which is an aluminum, copper, magnesium alloy, and 7075, which is an aluminum, zinc, copper, magnesium alloy. Both of these materials can become susceptible to stress corrosion cracking after welding. This phenomenon is particularly dangerous because it is not detectable immediately after welding, and usually develops at a later date when the component is in service. The completed weld joint can appear to be of excellent quality immediately after welding. However, changes which occur within the base material adjacent to the weld during the welding process, can produce a metallurgical condition within these materials which can result in intergranular micro cracking, which may be susceptible to propagation and eventual failure of the welded component. The probability of failure can be high, and the time to failure is generally unpredictable and dependent on variables such as tensile stress applied to the joint, environmental conditions, and the period of time which the component is subjected to these variables. we have bondoed some rotors as well but even still ive sen them 20 runs later cracking from the area into areas that were not welded at the time of repair,our best one now is a time bomb!

 

Thermally normalized?

Can the entire part be thermally normalized after the welding repair had been done to reduce the effects from the weld?

 

welding

when you say bondoed that was to fill scrathces i presume or gouges i have seen bondo used inside intake maifolds as well. how did the bondo hold up.

 

Sorry JR i was being sarcastic i meant filled with weld and blended