SATPC0030771 Tab 04 4 SOW -redacted.pdf

Statement of Work For melting of NiTiHfZr large size ingot

Customer: NASA Glenn Research Center – Shape Memory Alloy Group

Prior Experience:

Contractor must have prior experience in producing NiTi based shape memory alloys and must be able to produce a ~90lb ingot of the target alloy using the required melting method and with the required impurity levels.

Composition

Final Target Composition of Ingot:

50.3Ni-29.7Ti-5Hf-15Zr (at%)

44.497Ni-21.427Ti-13.451Hf-20.624Zr (wt%)

If potential company does not have compositional adjustment factors for melting:

Charge Composition should be as listed below, in order to have a high chance of successfully meeting the target ingot composition:

50.4Ni-29.6Ti-5Hf-15Zr (at%)

44.578% Ni, 21.352% Ti, 13.449% Hf, 20.621% Zr (wt%)

Target Ingot Weight

90 lb

Impurity Levels:

Carbon < 0.015 wt%, Oxygen < 0.03 wt%

Melting Method:

Ingot must be produced via double melt Plasma Arc Melting (PAM/PAM) or Plasma Arc Melting followed by Vacuum Arc Remelting (PAM/VAR) with a final ingot diameter out of the second melt of not more than 6 inches.

Ingot Heat Treat – Not required on quote – can be performed separately:

Homogenize 1050C/72hr in vacuum > 10E-5 Torr in a carbon free furnace (no graphite elements or insulation).