I spent a LOT of time combing through the USPTO website reviewing trademarks before posting this discussion Ed. I can certainly trademark "AR" with the proper font if i choose to. So the trademark is not an area of great concern at this point. I'm still considering proper names.
Tygerdawg...
Those who lack basic engineering skills and couldn't engineer their way out of a paper bag invariably seem to end up in business school to pursue an MBA. After graduation they are put in charge of teams of engineers and tell them what to do and how to do it. Think I'm kidding? I'm not.
Mfgenggear, many of these grades would excel in gear cutting hob applications. I am looking forward to the very first field trials that will be conducted.
In general, no. There shouldn't be any correlation between the level of sharpness that can be achieved on the cutting edge of a tool and the prior austenitic grain size of the microstructure. The level of sharpness you require for a given application however depends on what you are doing. As you...
A US patent was just issued in February of this year for a new family of super high speed steel alloys that I invented. You can read about them here:
https://reardonmetals.com/
These grades are so new that they don't even have an official name yet. That's one of the reasons why I am posting...
The area circled in red exhibits evidence of fatigue crack growth propagating from a stress riser at the surface that likely acted as an initiation point.
It sounds as though you are dealing with a stainless steel alloy containing approximately 12% chrome. Consult the tables and figures in chapter 12 entitled "Stainless Steels" of the hardcover book Metallurgy for the Non-Metallurgist, 2nd Edition.
"Once upon a time the specialty steel companies had experts that you could talk to.But they have all been fired to save the CEOs bonus."
Yes they have Ed. I'm one of them. So I decided to start my own company. I officially launched it in January of this year.
I was 15 years out of school when I took the metallurgical PE exam 20 years ago. And I walked in cold. There was no review text available for this particular exam back then. An average of about 50 people across the United States took this exam in any given year, so about one person per state...
The fact that you are compelled to talk down to and denigrate anyone who offers any practical or useful advice to the OP, including those like myself who did recommend that it would be wise to perform a thorough metallurgical failure analysis, should serve as a red flag to others participating...
This appears to be a fatigue failure that initiated at multiple locations along the thread root. This is evidenced by the ratchet marks that can be seen on the fracture surface at the OD. The location of the final fracture region suggests that it is not a pure tensile failure. Rotating bendng...
There are roughly 50 people in the United States who take the metallurgy PE exam in any given year, or about one person per state on average. So finding a study group may be difficult to do. I took the exam back in 2004 when I was 40, and passed on the first try. I read a little bit from some...
And he is milking away as we speak. Al has been a partner in the venture capital firm Kleiner Perkins, formerly known as Kleiner Perkins Caufield and Byers, since 2007. And he is making tens of millions of dollars every year on his firm's investments in "green" technology companies. I find it...
