My regards to Ralph aka "tombstone" for sending me a link to this thread. Here are some pictures that were not included in the threads post. It was approximately two weeks before I received any news of failure. The bowie was returned for further inspection upon which I came to my conclusion and issued this response.
"Hey Jason, I received the Bowie knife. After further review and upon inspection I have come to the conclusion that this blade failure was due to exceeding its intended and designed purpose through extreme testing and use. After much thought & review I believe that I made this blade correctly and to the best of my ability and that it would’ve performed its intended purpose without issue e.g cutting, slicing & puncturing. I believe that the heat treat and grain structure are of a more than acceptable quality for this piece. Therefore I cannot in good conscience make a free replacement blade for what I deem to be a failure that is due to misuse and unintended use. Also note that I did not build this piece to be a chopper but a Bowie and Bowie’s are not at large designed to be choppers nor was I informed upon building this knife that it would go through an extreme chopping test.
I am willing to return this blade to you at my own expense with the handle wood you sent me when it arrives.
Thank you.
Matthew"
I also did my own tests with the blade in the condition it was returned in. My response to the buyer
"Some tests: I did some chop tests with the blade that was returned in the condition that it was returned in. First I chopped a dried poplar log in two. Then I chopped some green saplings. I finished by chopping a piece of antler in half. There were no chips or breaks. From this information alone I can determine that the heat treat was fine for this knife's designed purpose. If the heat treat was truly off, the blade would have broken in half at the first instead of having a large chip break off. If after this case is closed you receive a refund then business will be ended between us. If after this case is closed you do not receive a refund then I will as stated in my original message return this knife to you at my own expense.
Thank you,
Matthew"
There is no Hamon by the edge. The blade was treated (by the buyer) with apple cider vinegar to help protect from rust. With use the finish wears off.
As for asking to complete the transaction outside of eBay, I declined. Since the contact and transaction had been started through eBay I wished to complete it through that venue.
My heat treat.
1. Normalize several times after forging to relieve stress and refine grain.
1st cycle, 4-5minutes , 1600° -1650° F
2nd cycle, 4-5minutes 1550° -1585° F
3rd cycle, 4-5minutes 1500° F
4th cycle, 4-5minutes 1475° -1500° F
5th cycle, 4-5minutes 1400° -1425° F
6th cycle, 2-3minutes 1200° -1350° F
2. Quench in oil after 4-5 minutes soak time at 1475-1500 degrees Fahrenheit
3. temper two cycles, one hour each at 400-425 degrees Fahrenheit letting it cool to room between cycles.
Heat treating was done in a propane forge. Included are some pictures of the grain.
tempering was done in an oven that was temperature checked.
Edge thickness - 0.15-0.2"
Pictures.
Pictures from buyer after receiving it
After being returned - Inspection and grain
My test