10-02-2007, 05:10 AM
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#21 | | Senior Member
Join Date: Jul 2005 Location: ??FC ~)---------- San Francisco, CA
Posts: 2,291
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Originally Posted by erooMynohtnA  That is a shop. I can tell from some of the pixels, and having seen many shops in my time... | I have to agree with you here. Purple Fencer is widely known throughout the L.A. area as a shady character.  And, if you zoom in on some of those pixels they do look disturbingly blurry. Why are those pixels so blurry Purple Fencer? What are you trying to hide?
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"I don't mind being the smartest man in the world. I just wish it wasn't this one." - Ozymandias
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|  | | And now for this message... |
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10-02-2007, 10:03 AM
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#22 | | Senior Member
Join Date: May 2002 Location: South Texas
Posts: 2,890
| I rounded up 14 broken blades in my garage. My son used a few more in a school project. Out of the 14, 11 were FIE blades: 9 BF Uhlmann and 2 STM gold. The 3 non FIE include a SG, a STM rainbow, and another rainbow unmarked blade. The kid took the camera that I use, sorry no pics for today.
Sharpest blade is one of the FIE BF Uhlmann 505 with a 45 degree angle between the bottom of the V and one edge; the other side is almost flat to the V. It is sharp to the fingertip, but it does not look as sharp as the one Purple posted. The second sharpest was the SG non-FIE. Then, a toss-up between a colored STM non-FIE and another BF FIE.
My recollection is that I hated the 505 batch because I had several break within 3 months.
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Last edited by JEC; 10-02-2007 at 10:11 AM.
Reason: Correction on angle
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10-02-2007, 01:53 PM
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#23 | | Senior Member
Join Date: Jan 2001 Location: Pacoima, ca USA
Posts: 5,942
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Originally Posted by OROD I have to agree with you here. Purple Fencer is widely known throughout the L.A. area as a shady character. And, if you zoom in on some of those pixels they do look disturbingly blurry. Why are those pixels so blurry Purple Fencer? What are you trying to hide?
. | Your ugly mug! | |
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10-04-2007, 12:07 PM
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#24 | | Senior Member
Join Date: Jul 2004 Location: London UK
Posts: 666
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Originally Posted by KD5MDK I believe the intention was to reduce the number of breakages, with the sharpness of said breakages being no different than ordinary. | Perfectly phrased.
You are totally correct, there is no truth in the fact that maraging steel is designed to break with a larger surface area.
Beginning of story:
1 Their lifespan is approximately 5 times longer
2 they therefore break 5 times less
3 therfore the likleyhood or an accident is 5 times lower.
end of story.
Whilst checking a few blades may help you would need a very large number and a means of measuring the surface area at the tip to come up with any statistically significant answer.
When they were introduced it was purely a lifespan issue, if someone can show that the pattern of break is significantly safer than please do so however; this was not a factor when the rules were introduced. | |
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10-05-2007, 03:52 PM
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#25 | | Member
Join Date: Sep 2007
Posts: 94
| what does "maraging" mean? | |
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10-05-2007, 04:12 PM
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#26 | | Senior Member
Join Date: Jan 2001 Location: Pacoima, ca USA
Posts: 5,942
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Originally Posted by samster what does "maraging" mean? | It's a type of steel....a shortening of Martensitic Aging http://en.wikipedia.org/wiki/Maraging_steel | |
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10-09-2007, 04:01 PM
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#27 | | Senior Member
Join Date: May 2005 Location: The Driftwood Bar, Louisiana
Posts: 485
| I've got a bunch of broken blades at home, both FIE and non-FIE. If you want, I'll send you some pics, Purple, so you can do your statistical analysis of them. 
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10-21-2007, 11:54 PM
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#28 | | Member
Join Date: Feb 2006 Location: Midland, TX
Posts: 73
| My wife snapped a non-maraging Chevalier at a tournament this morning. I thought of this thread when I saw it.
Edit: The blade was less than a year old, supporting the lifespan issue. It took a mean bend in the medium that it just never got over.
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Last edited by DesertFencer; 10-22-2007 at 12:10 AM.
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10-22-2007, 12:03 AM
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#29 | | Yes We Did
Join Date: Mar 2006 Location: Madison, WI
Posts: 2,109
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Originally Posted by DesertFencer My wife snapped a non-maraging Chevalier at a tournament this morning. I thought of this thread when I saw it. | Clearly it was an FIE blade misbranded as non-FIE. Everyone knows that only maraging steel breaks flat. (Unless it's saber, in which case normal steel can also break flat, but everyone knows that too.) | |
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10-24-2007, 10:31 PM
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#30 | | Senior Member
Join Date: May 2000 Location: Chicago
Posts: 114
| Last 2 foil blades I broke both broke flat, and both were plain carbon steel. Both also were (I believe) fatigue weakened. I have a theory that jagged breaks are more likely the result of forging flaws or defects in the blade steel.
I never understood the rationale of flat vs. un-flat as being the primary reason for the use of maraging steels in the first place. A foil broken anywhere near the tip still has a very small cross section even if it breaks flat, and has nice squared edges to punch through material.
I also always wondered why FIE didn't just have an eddy current machine or some other electrical mechanism for detecting a blade with a weak spot at major tournaments. | |
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10-24-2007, 10:50 PM
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#31 | | Senior Member
Join Date: Jul 2005 Location: ??FC ~)---------- San Francisco, CA
Posts: 2,291
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Originally Posted by fred I also always wondered why FIE didn't just have an eddy current machine or some other electrical mechanism for detecting a blade with a weak spot at major tournaments. | Probably because a machine that can detect such flaws is going to cost quite a lot.
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"I don't mind being the smartest man in the world. I just wish it wasn't this one." - Ozymandias
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10-25-2007, 11:30 AM
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#32 | | Senior Member
Join Date: May 2007 Location: SF bay area (ca-USA)
Posts: 360
| Quote:
Originally Posted by OROD Probably because a machine that can detect such flaws is going to cost quite a lot.
. | There actually is or was a group devoted to making a homebrew eddy current tester using only a computer with a sound card and a ~$70 honeywell sensor ( i think a salvaged tape player read/write head will work). I put some info in an earlier thread. Eddy Current Testing
__________________ entia non sunt multiplicanda praeter necessitatem "a braggart, a rogue, a villaine that fights by the book of arithmatick. Why the dev'l came you betweene us?.."
Last edited by the ancient one; 10-25-2007 at 11:37 AM.
Reason: added link
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