Engineered High-performance Alloy Design and Production with Solidification and Powder Metallurgy

National Laboratory: 
Pacific Northwest National Laboratory
Processing/Manufacturing Class: 
Fabrication and synthesis
Description: 

This capability features an arc melting method and powder metallurgy. This capability is not limited to solidification. For developing high-performance alloys, high- and low-energy physical mixing (mechanical alloying), sintering, oxidation and reduction control, and rolling methods also are available. This capability can manufacture special alloys, bulk metallic glass, high-purity alloys, metal matrix composites, and functional materials.

Capability Bounds: 

This capability can be used to thermodynamically evaluate chemical properties within known databases. The arc melting furnace can heat up over 10,000 K and cool with various sizes (<0.02 liter). The high-energy SPEX-milling machine can make <0.01 liter at a time. Sintering and redox control can be done in heat treatment furnaces with thermodynamic evaluation.

Unique Aspects: 

Solidification and deformation rates are easily controllable. This capability is larger than university scale but smaller than industry. Hence, it is best used before commercialization to solve any manufacturing line problems. Pure hydrogen atmosphere heat treatment also is possible.

Availability: 

Facilities are available for both government and private (proprietary) project work.

Single Point of Contact: 

Name: Darrell Herling
Email: darrell.herling@pnnl.gov
Phone: 509-375-6907

References: 
  1. Kim J-H., J-W Choi, J.P. Choi, C-H Lee, E-P Yoon: Journal of Materials Science Letters, 'A study on the variation of solidification contraction of A356 aluminum alloy with Sr addition,' Vol. 19, 2000, 1395-1398.
  2. J.P. Choi, K.B. Kim, J.P. Park, E.P. Yoon, T.W. Nam: Materials Science Forum, 'The effect of electromagnetic vibration on the silicon size at hypoeutectic Al-Si alloy,' Vol. 475-479, 2005, 409-412.
  3. Cui J., J.P. Choi, E. Polikarpov, M.E. Bowden, W. Xie, G. Li, Z. Nie, N. Zarkevich, M.J. Kramer, D.D. Johnson: Acta Materialia, 'Effect of Composition and Heat Treatment on MnBi Magnetic Materials,' Vol. 79, 2014, 374-381.
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