SATPC0038213 Tab 04 SOW.pdf
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- Solicitation number
- 80NSSC25901546Q
About this file
This Statement of Work (SOW) details NASA's procurement for processing experimental NiTi-16Hf alloys through vacuum arc melting. The specific requirement is for producing rod/bar stock with a 1" to 1.125" diameter and approximately 6" length, with a precise composition of 50.6Ni – 33.4Ti – 16Hf in atomic percent. The initial procurement is for 0.6 to 0.8 kg of material, with critical technical requirements including minimal impurities, homogeneous composition, and no cracks in the final rod.
Key technical specifications mandate that the supplier have demonstrated experience in melting NiTiHf shape memory alloys, using virgin melt stock and performing melting under vacuum to minimize oxide and ceramic inclusions. For suppliers without prior material supply experience, NASA may request a 3 kg test/evaluation charge. Each heat will be prepared as a single batch with a certificate of chemical analysis, and the material is intended for use at NASA's Glenn Research Center (GRC). The experimental nature of the alloy is specifically noted, with no existing commercial standards or specifications applicable to the material.
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Statement of Work & Requirements
Introduction:
This procurement is for processing (melting and casting) of experimental NiTi-16Hf alloys.
Final form should be rod/bar stock (1” - 1.125” diameter) and lengths of approximately 6”. As these are experimental alloys, there are no commercial standards or specifications to which the material can be stated. The rods MUST be in one piece with no cracks.
Statement of Work:
For all items (3) we would like to procure vacuum arc melted, cast rod (1” - 1.125” diameter) of the composition and quantity defined below:
Item 1.) 0.6 to 0.8 kg of the following alloy in atomic percent (at.%): 50.6Ni – 33.4Ti – 16Hf; cast into ~1” rod. No other secondary processing needed.
Requirements:
1. The supplier shall have demonstrated experience in the melting of NiTiHf shape memory alloys with good quality. Alloys should be clean, homogeneous, and with very low inclusion content, Impurities, such as O, and C will need to be at kept at minimal levels. Companies that have not supplied material previously for our application should provide a 3 kg.
test/evaluation charge of item #1 upon request for evaluation at GRC.
2. A single heat will be prepared for each item (alloy) above, formulated using virgin melt stock.
A certificate of chemical analysis will be supplied for each master heat.
3. Melting to be performed under vacuum to minimize oxide inclusion content. Every effort should be made to minimize ceramic or other inclusions and ensure that the melt is homogeneous without unmelted metal content.
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