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Hello All, I'm working on a part that will be made out of AISI 4340 and will have tungsten carbide coating as finished surface. It will be machined, hardened and coated and surface finished to get mirror surface roughness. Can any one suggest which grade should be used for machining? What's...

Thsnks tbuelna thanks for the help. This graph shows results with stress concentration 3. Can you please suggest me how I use this for fatigue analysis? Ideally I believe I need fatigue test results of test done without notch so no stress concentration. Thanks

I want to perform fatigue analysis on a part made of 17-4ph. I only found the S-N curve for the fatigue test of the notched specimen. I couldn't find test results of the un-notched specimen. How can I use data of the notched specimen fatigue test in Ansys? I believe, notched test data are for...

Thanks for the detailed explanation. The two things that took my interest the most are "how it's made" and "sample orientation". Can you refer me to somewhere where I can have some more details on that? I am working on a part failure analysis. Got results from a lab but those results are...

I am trying to find an S-N curve and/or the strain-life curve of 17-4ph h1025. I found the data for high temperatures on the AMS website but nothing at room temperature. That is strange, I believe if it is tested at high temperature than there should be some reports available for room...

Thank you guys for the Answer.I read this today only. I hadn't received any notification of the replies. Thank you EdStainless for detailed info. Can you please tell me the source of this info? I want to read more.

I want to do a stress analysis of an adapter that is designed to convert Metric thread to US standard. That converter has both female threads. I want to know how to confirm stresses at the joint with minimum computation. The pipe system is at high pressure and room temperature. It will transfer...

Hello there, Can someone help me to find S-N tabulated data for 17-4PH steel? I am unable to find it online. [thanks]

Thank you 3DDave and dgallup for answers. "Rz is the sum of maximum peak and maximum valley of a profile, while Rmax is only the value of maximum peak of the profile." In the surface quality test, there are two lengths for measuring, sampling length and evaluation length. Rz is an average of...

I have this surface finish on a manual. Nothing specific about unit of anything is given. What should I interpret it? thanks in advance.

Thank you guys, for your effort, but I am still confused. @EdStainless, isn't it that liquid will most probably take away more heat compared to air. @IRstuff I calculated that for mineral oil and with temperature difference of 15 degree celsius. Can you please explain how you calculated?

So, problem is we got many unitless numbers in CFD. Like Nu, Pr, Pe, Re etc. We need to use different equations based on the conditions to get those numbers. All numbers are not required to solve the problem, so it is also important to used correct number and relations to solve it. Now, in...

Hi guys, Each board is generating 1600 W and each board has 60 processor sets. Each set has individual heat sink. Means each heatsink get 26.67 W heat. and total number of boards are 24. So total heat is 38.xx kW. Each heatsink has surface area of 6345 mm^2 area. This is insane, but is...

Good day guys, I am designing a cooling system for computer with large number of small processor. Simply, There will be 24 boards working together. Each board have 60 heat sinks and generates 1600 W heat. So, we have 26.67 W heat, under each heat sink. This will be a liquid immersed cooling...