Senior Design Update

[RyanbabZ71]

Well I have completed fatigue testing D2 tool steel (3/8" samples) and have almost completed the testing of the cryogenically treated samples (only have 3 more tests) and the data is showing the cryogenically treated samples are slightly better (fatigue wise).  A previous senior design project was M2 testing and they had no change in the properties.  Past tests showed that the cryogenic treated steel had an improvement in wear.  We are making sure it doesnt decrease the fatigue.  

 

Some of you may wanna check out http://www.300below.com they do cryogenic treating of car parts and it looks like it makes it stronger  

 

Now i have a bunch of statistical analysis to complete (fun stuff).  Hopefuly ill be done by april 4th cause i have to present this at valpo university.

[BlueRado]

Sounds cool Ryan.  When you fatigue test, do you tensile, shear, or bend, or is it measuring "work hardening" fatigue.

 

Sorry, I'm not an engineer.  

[RyanbabZ71]

I use a rotating beam fatigue machine.  You apply a moment (in-lb) and calculate the stress applied.  The counter counts the cycles until failure