We are trying to certify a qualify a WPS with Haynes 188.The filler material is Haynes 188,.062 thick,manual GTAW (no pulse),argon shielding.The problem is the way the deposited weld bead looks,in that,is it as if there is a separation of the alloy in the weld metal.The center of the bead is a gold/straw type of color,and the on the sides is a grey mate looking color almost like a slag.I looked at it under a stereo microscope,and its all tied-in good,but looks as if there is some type of segregation.
We have done all the basic stuff (prep,heat input,etc.),and I even welded a test coupon myself and got the same condition.
Has anyone seen this condition?is it acceptable?We send the test plates to Arizona for X-ray,which is a bit expensive,and I do the visual before they are sent.
Any help?
Thanks,Ringo