How to pass bend test Aluminum 5083

admin

I have just tested with Aluminum 5083 with MIG welding process. (Use Filler metal 5356 1.0mm diameter, Argon gas protect). in 3G position.But unfortunate, it's fail, have many porosityAnyone can help me to pass this problem.TensileBendBend
Reply:What was the preheat temperature , porosity in aluminum is caused by oxidization and hydrogen and grease or oil or lack of sheilding gas , i just passed a 5052 test the other day, using 250 degrees F preheat 5356 wire and 75 helium 25 argon mix. I prepped the hell out of the plates and welded according to procedure.My aluminum book states for 5083 when there is no requirement for groove weld welding procedure qualifications in accordance with the structural code, this is because 5083 base 5356 filler will typically not obtain the minimum tensile requirements of the code. Developed for the 5083 base alloy the 5183 filler meets the mechanical property requirements for groove weld procedure qualification. Quoted chapter 4 welding aluminum questions and answers.  now for my questions do you have a procedure. Are you running straight argon ? Is that to procedure ? Do you have a preheat specified on procedure?Molten aluminum soaks up hydrogen faster then a wet sponge, How fast are your weld speeds ? are you making very small beads or larger ones ? Do you have new wire or old wire? How did you prep the material ;acetone , then HAND ss wire brush? Did you have a fan running when you were welding the test coupon ? Did u use a wax or wd-40 to lubricate the saw when preping the plates ? Water oil mix saw lubricant ?  Are you using anti spatter either on the nozzle or on the aluminum ? Just a couple things to look at dont mean they are rite or wrong .I forgot how to change this.
Reply:Thank you very muchI don't have a procedure. I try to do that. But i am a newbie about aluminum.After reading your post. Many many thing i must to make correct.I didn't prepared complete as you say.I clean it = NaOH but after cleaning i don't washing it by water.I didn't preheat Base metal before weld.Because it's difficult to book ER5183 so i use common material  ER5356 and old wire.I'll retry it.P/s: A question, i using DCEP for weld aluminum without pulse (it's OK?)
Reply:The naOH explains why your pieces are so black, stop using it, use acetone wipe down the plates. then prep with a CLEAN hand stainless steel wire brush u will feel the oxides break free. preheat to 200-250 F i do not use pulse welding aluminum, i dont like it. and yes dcepI forgot how to change this.
Reply:It's nice to meet you.I'll retry it follow your saying.And then post the test result image, X-ray film, bend test and tensile.Can you consult me more to do it succesfully.P/s: This is the first time, I try to do it before reading your tips.The result is very bad.
Reply:Brush the oxide layer off with a ss brush, do not use a power brush or wire wheel (it will push contaminates into the surface of the metal). Wipe the joint with acetone before and after brushing, do not use caustic cleaners or acid wash. pre-heat the metal and use new clean wire of the appropriate grade.
Reply:Since u don't have a procedure switch to 75% helium 25% argon , use the correct filler if your doing tensile tests and prep the plates as we have described.I forgot how to change this.
Reply:Originally Posted by LawsonWeldingLLCSince u don't have a procedure switch to 75% helium 25% argon , use the correct filler if your doing tensile tests and prep the plates as we have described.
Reply:More heat less chance of hydrogen entrapment ie porosity.  It is harder to find the sweet spot but it makes a much better weld profile.Here is a fine article on the subject. http://www.esabna.com/us/en/educatio...g-aluminum.cfmLast edited by LawsonWeldingLLC; 07-28-2011 at 12:39 AM.I forgot how to change this.
Reply:Here is a esab article i just found that pertains to 5083 Base metal and failing guided bend tests. http://www.esabna.com/us/en/educatio...base-alloy.cfmAnd another on what the best filler alloy for 5083 is http://www.esabna.com/us/en/educatio...base-alloy.cfmAnd another that pertains specifically with porosity in aluminum welds.http://www.esabna.com/us/en/educatio...GMAW-Welds.cfmI forgot how to change this.
Reply:Hi Lawson... thanks for those really useful links, especially that last one - right on the money!Rick V 1 Airco Heliwelder 3A/DDR3 CTC 70/90 amp Stick/Tig Inverters in Parallel1 Lincoln MIG PAK 151 Oxy-Acet
Reply:Originally Posted by sn0border88He's MIG welding, straight argon is the normal.  Are you suggesting using a He/Ar mix for MIG or do you have it mixed up with TIG?If so, whats the benefit of running the He mix with a wirefeeder?