Dwarf Fortress > DF Modding

How to Approximate Titanium Ceramic Coatings?

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AceSV:
Alright, so I want to do a Furry Fortress race that can use Rutile or Ilmenite to improve steel blades.  I always thought that titanium was used as a steel alloy, but apparently not.  But titanium is sometimes combined with steel as ceramic coatings, TiC or TiN (not to be confused with Sn). 

The reaction I want to keep vague, but how would you approximate the material properties of Ti-ceramic coated steel? 

Matweb TiN
Wikipedia TiN
Matweb TiC
Wikipedia TiC

Here is a DF material I made based on a combination of TiN and TiC stats:
Basically, modulus of elasticity is very high, tensile strength and shear strength seem low. 


--- Code: --- [STATE_NAME_ADJ:ALL_SOLID:frozen excalibar]
[STATE_NAME_ADJ:LIQUID:excalibar]
[STATE_NAME_ADJ:GAS:excalibar]
[DISPLAY_COLOR:6:0:1]
[BUILD_COLOR:6:0:1]
[MATERIAL_VALUE:40]
[SPEC_HEAT:]
[MELTING_POINT:9968]
[BOILING_POINT:9968]
[SOLID_DENSITY:5000]
[LIQUID_DENSITY:4800]
[MOLAR_MASS:]
[IMPACT_YIELD:451500]
[IMPACT_FRACTURE:903000]
[IMPACT_STRAIN_AT_YIELD:466]
[COMPRESSIVE_YIELD:451500]
[COMPRESSIVE_FRACTURE:903000]
[COMPRESSIVE_STRAIN_AT_YIELD:466] bulk modulus 96.8 GPa
[TENSILE_YIELD:129000]
[TENSILE_FRACTURE:258000]
[TENSILE_STRAIN_AT_YIELD:22] young's modulus 600 GPa
[TORSION_YIELD:129000]
[TORSION_FRACTURE:89000]
[TORSION_STRAIN_AT_YIELD:54]
[SHEAR_YIELD:129000]
[SHEAR_FRACTURE:89000]
[SHEAR_STRAIN_AT_YIELD:54] shear modulus 240 GPa
[BENDING_YIELD:129000]
[BENDING_FRACTURE:258000]
[BENDING_STRAIN_AT_YIELD:54]
[MAX_EDGE:10000]
[STATE_COLOR:ALL:GOLD]
--- End code ---


Supposedly a real life ceramic blade would crack in half, and I think DF physics would reflect that as a bad weapon, but since they make real-life ceramic coated knives, I would assume something like that could work. 

Also, when I read posts about why a titanium sword wouldn't work, it sounds like pure titanium is too soft, titanium ceramics are too hard.  But if that's the case, real life medieval metallurgists came up with pattern welding and katana folding to combine the properties of hard and soft steel, so maybe that is a plausible way to approach an all-titanium blade? 

AceSV:
Actually, thinking about what I want gameplay-wise, an all titanium pattern-welded/folded Ti/ceramic mix would be better so that you don't need to import steel as long as you find that one lump of rutile on your map. 

Here is the material for titanium:

--- Code: ---[STATE_NAME_ADJ:ALL_SOLID:frozen titanium]
[STATE_NAME_ADJ:LIQUID:titanium]
[STATE_NAME_ADJ:GAS:titanium]
[DISPLAY_COLOR:0:7:1]
[BUILD_COLOR:0:7:1]
[MATERIAL_VALUE:40]
[SPEC_HEAT:]
[MELTING_POINT:9968]
[BOILING_POINT:9968]
[SOLID_DENSITY:4506]
[LIQUID_DENSITY:4110]
[MOLAR_MASS:]
[IMPACT_YIELD:490000]
[IMPACT_FRACTURE:770000]
[IMPACT_STRAIN_AT_YIELD:445]
[COMPRESSIVE_YIELD:490000]
[COMPRESSIVE_FRACTURE:770000]
[COMPRESSIVE_STRAIN_AT_YIELD:445] bulk modulus 110 GPa
[TENSILE_YIELD:140000]
[TENSILE_FRACTURE:220000]
[TENSILE_STRAIN_AT_YIELD:121] young's modulus 116 GPa
[TORSION_YIELD:140000]
[TORSION_FRACTURE:220000]
[TORSION_STRAIN_AT_YIELD:318]
[SHEAR_YIELD:140000]
[SHEAR_FRACTURE:220000]
[SHEAR_STRAIN_AT_YIELD:318] shear modulus 44 GPa
[BENDING_YIELD:140000]
[BENDING_FRACTURE:220000]
[BENDING_STRAIN_AT_YIELD:318]
[MAX_EDGE:10000]
[STATE_COLOR:ALL:]
--- End code ---

Putnam:
You didn't set your thermal properties right in the material helper. That'll boil at the same temperature as water.

Anyway, the game really can't handle coatings well. I would just increase sharpness and maybe shear and tensile strengths.

Godlysockpuppet:
From my limited reading into the matter, it seems TiN in the real world is not used to increase sharpness of blades but rather preserve their edges, reducing the need for maintenance. You can't really reflect that ingame, so just give it a sharper edge.

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