Hello, my company want to certify their welders with AWS D17.1:2001 code in the follow materials, aluminum, titanium, inconel, stainless steel, in TIG process. According to this, we made to our welders a test to see their ability, and I would want that you give me your opinion about the results and your recommendations, if it can be done.
Attach, you can found the pictures of the test:
1. Aluminum 7075, t=0.063". Filler metal: ER 4043, Amperage: 102.5 amp AC. Panel Size: 3" X 7.5"
2. Stainless steel 301, t=0.071". Filler metal: ER308L, Amperage: 85 amp DC. Panel Size: 3" X 8"
3. Titanium 6Al-4V, t=0.040". Filler metal: AMS 4951, Amperage: 46 amp DC. Panel size: 2.2" X 8"
Note: each test used 2 panels
In all tests, we found many things apparently .
1. A line along the back side of the weld.
2. A line (like a crack) along the back side of the weld
3. Discoloration, and poor penetration
Thank you