I think you may need to contact your material supplier to get the Loss Curves at the various frequencies, which are based on Epstein frame measurements of a small sample, at various frequencies of a sinusoidal magnetic field.
http://www.infolytica.com/en/applications/ex0166/
Thanks, TVP. Could the universal test machine (Instron or MTS) reach the upsetting speed? In other words, does the cross-head travel speed (the specimen strain rate) have no influnce to the results?
Many thanks again, TVP. I checked with Bodycote (now Exova) 1 year ago for upsetting test service and I got NO because they do not have such equipment like Petig or Vale upset tester. I will phone them again to check, they may be able to do it now.
Many thanks, TVP. All are valueable and good points.
We did check the surface finish and even did mechanical grinding on a few rods presenting orange peel problem. We still got the similiar orange peel problem on the grinding rod.
Upsetting test is the one that we would like to do but failed...
Thanks, CoryPad.
It makes perfect sense to me. Unfortunately, the mills are located in China and Korea. We purchased the raw rods from a American distributor. We could not know the details about the processing conditions and have no controls.
Thanks, salmon2.
I just visually observed the grain size under a simple optical microscope and did not see big size difference. We are waiting for the raw material supplier's testing results that I hope to get the grain size number per ASTM E-112.
We are doing cold-heading of C15000 (zirconium copper) rod (0.5" Dia). Recently, we have orange peel on the finished product by using the rods from a newly arrived production lot, while switching back to rods from the old lot, we could get nice/smooth surface finish. After checking the...
Can you mask your testing coupon to have partial area coated with Ni and the rest uncoated for a step? Then you could use a surface Profilometer to let the stylus scanning from the coating to the uncoated area to measure the step, which will give your coating thickness.
