Forged titanium san mai ring dao

Discussion in 'Mad Science Forge' started by Mecha, Feb 21, 2021.

  1. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    Hello all,

    Here is a large two-handed ring dao sword, with a blade made of titanium san mai construction. The style is a futuristic version of the Chinese ring dao that became popular during the Sui Dynasty, a short but potent transitional period between the Han and Tang dynasties. Toward the end of the Han dynasty, straight dao with a ring pommel started to replace the jian double-edged sword as a primary infantry weapon. This type of sword was made ubiquitous during the Sui Dynasty which united China, and was carried into the subsequent Tang Dynasty period.

    The blade is forge-welded san mai, with a core of Russian body armor titanium alloy, clad with USA tank armor titanium alloy. Dan Keffeler and I made this billet and some others last winter, during a huge burst of effort facilitated by Ed Schempp. I think a san mai construction is pretty much the pinnacle of titanium alloy sword blade construction.

    OAL: 40.75"
    Blade: 29" full convex
    Hilt: titanium alloys
    Handle: rubber, nylon, leather

    As with most of my swords, the handle can flex a bit along with the blade so the entire piece can flex as one and absorb shock.

    Sorry about the weak pics. The sword was difficult to photograph.


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    VIDEO!





    Thanks for looking!
     
    Last edited: Feb 21, 2021
  2. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    Here are some WIP photos of the sword being made:


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  3. WValtakis

    WValtakis Hand Engraving, Ti anodizing, and mods Knifemaker / Craftsman / Service Provider

    May 29, 2004
    Yet another amazing, otherworldly piece...freaking awesome :cool::thumbsup:
     
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  4. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    Ty sir.
     
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  5. WValtakis

    WValtakis Hand Engraving, Ti anodizing, and mods Knifemaker / Craftsman / Service Provider

    May 29, 2004
    What's the weight?
     
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  6. HJK

    HJK Moderator Moderator

    Jun 30, 1999
    I love that.
     
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  7. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    Thanks much. Gotta make more.
     
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  8. Bigfattyt

    Bigfattyt

    Jun 23, 2007
    Amazing as always. How is the ring pommel attached?
     
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  9. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    It's welded directly to the tang with a big fat weld. :D
     
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  10. fishface5

    fishface5

    Feb 3, 2001
    Awesome! I'm sure a ton of thought went into the use of the 2 alloys, can you tell us more about the choice and benefits??
     
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  11. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    1 lb 9.7 oz, though I must say, the neutral weight distribution and balance makes it feel like less.
     
  12. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    While both of the alloys are quite tough and springy, the cladding alloy is tougher, softer, and more resistant to cracking or chipping. However, the cladding alloy is possible to bend in a malleable way if subjected to hard impact as a very thin edge. After HT, the core alloy is harder, and will not gall or take a set. If subjected to enough force it will instead break or chip, which is what the hard crystalline form Alpha Prime (also called 'titanium martensite') does if the right ti alloy is heat treated to produce it. The cladding supports the harder alloy and toughens the billet, as a true, proper san mai blade, not just for looks, but for structural effect.

    These two alloys are similar enough to weld without issues, which can (and will) arise when attempting to fuse ti alloys that are too different from each other. The two alloys also both heat treat roughly the same, which isn't the case for some other ti alloys. Ti 8mn, for example, is wildly different than any other ti alloy in HT.
     
  13. Richard338

    Richard338 Gold Member Gold Member

    May 3, 2005
    Is that the mark of your new stamp?
     
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  14. Boombats

    Boombats Gold Member Gold Member

    258
    Mar 21, 2010
    Incredible.
     
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  15. WValtakis

    WValtakis Hand Engraving, Ti anodizing, and mods Knifemaker / Craftsman / Service Provider

    May 29, 2004
    No, the new stamp has breaks in the electron rings:)

    IMG_1156.jpg
     
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  16. Richard338

    Richard338 Gold Member Gold Member

    May 3, 2005
    Thanks for confirming, I suspected it wasn't the stylish new version.
     
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  17. ShannonSteelLabs

    ShannonSteelLabs KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Sep 9, 2015
    Dude wow. Absolutely spectacular work.
    Didn't know that about the 2 TI alloys. Very cool stuff.

    Its even more awesome that the san mai is functional for performance.
     
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  18. jbmonkey

    jbmonkey Platinum Member Platinum Member

    Jun 9, 2011
    very cool there. wish it were mine.:)
     
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  19. greatscoot

    greatscoot Some other kind of crazy. Platinum Member

    Jul 21, 2012
    Outstanding.
     
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  20. Mecha

    Mecha Titanium Bladesmith Knifemaker / Craftsman / Service Provider

    Dec 27, 2013
    Thanks everyone. :p
     
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