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Accession Number
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DE2012-1055074
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Title
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NanoComposite Stainless Steel Powder Technolgies.
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Publication Date
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Aug 2012
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Media Count
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9p
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Personal Author
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G. Engleman R. R. Dehoff
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Abstract
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Oak Ridge National Laboratory has been investigating a new class of Fe-based amorphous material stemming from a DARPA, Defense Advanced Research Projects Agency initiative in structural amorphous metals. Further engineering of the original SAM materials such as chemistry modifications and manufacturing processes, has led to the development of a class of Fe based amorphous materials that upon processing, devitrify into a nearly homogeneous distribution of nano sized complex metal carbides and borides. The powder material is produced through the gas atomization process and subsequently utilized by several methods; laser fusing as a coating to existing components or bulk consolidated into new components through various powder metallurgy techniques (vacuum hot pressing, Dynaforge, and hot isostatic pressing). The unique fine scale distribution of microstructural features yields a material with high hardness and wear resistance compared to material produced through conventional processing techniques such as casting while maintaining adequate fracture toughness. Several compositions have been examined including those specifically designed for high hardness and wear resistance and a composition specifically tailored to devitrify into an austenitic matrix (similar to a stainless steel) which poses improved corrosion behavior.
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Keywords
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Amorphous materials
Borides
Chemical composition
Fracture toughness
Iron based alloys
Metals
Nanotechnology
Powder metallurgy
Research projects
Stainless steels
Wear resistance
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Source Agency
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Technical Information Center Oak Ridge Tennessee
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NTIS Subject Category
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71J - Iron & Iron Alloys
71N - Nonferrous Metals & Alloys
99F - Physical & Theoretical Chemistry
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Corporate Author
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Oak Ridge National Lab., TN.
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Document Type
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Technical report
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Title Note
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N/A
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NTIS Issue Number
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1308
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Contract Number
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DE-AC05-00OR22725
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