Why does the application of stress to a part produce a different corrosion mechanism other than just the type of corrosion that would occur without the application of that stress? Does thermodynamics or kinetics play a role in the process? Is it a matter of changing the fracture toughness...
During a CTE test, a stack of pure molybdenum samples (each 0.067 inch thick) was heated to 4000F. Melting of the material was noted in the center of the samples. Moly shouldn't melt until around 4700F. So I figured that there must be an alloy or some contamination of the base metal. We did...
I am looking to replace aluminum rivets used in a 6063-T6 aluminum structure. The main reason is to reduce assembly costs. I am thinking of using Monel 400 or 304 stainless steel. Their higher tensile strength will reduce by 1/2 the number of rivets. I am concerned about galvanic corrosion...
Does anyone have any information on the corrosion of 17-7PH by a hydrocarbon fluid called isoparaffins, specifically ISOPAR H made by Exxon? Is there any reason to assume the hydrocarbon fluid would be corrosive? I've been unable to find any information on this. The properties of the material...
Do the mechanical properties of 17-4PH in the H925 condition degrade significantly if it is aged an additional 4 hours at 925F? If so, do you have any data showing how much?
Thanks.
Paul
I have a complex structure that was assembled by electron beam welding 17-4PH sheet (0.090 inch thick) in the corners. The sheet is now in the H925 condition. The welds were supposed to be full penetration welds, but turned out to lack full penetration. They are around 0.050 - 0.070 inch...
I have an application in which I have to resistance spot weld a 304 stainless steel screen grid to the inside of a D6ac cylindrical section that is about 0.055 inch thick and 5 feet long. The stainless screen is about 0.030 inch thick. The spot weld diameter will be about 0.090 inch. The D6ac...
We have a 17-4 PH cylinder that has welded structures attached. We will be passivating the assembly in a dilute nitric acid bath and then rinsing. We are concerned that trace amounts of nitric acid may be trapped in crevices. We are considering heating up the assembly to about 400F to burn...
