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Novel Super-Elastic Materials for Advanced Bearing ApplicationsTribological surfaces of mechanical components encounter harsh conditions in terrestrial, marine and aerospace environments. Brinell denting, abrasive wear and fatigue often lead to life-limiting bearing and gear failures. Novel superelastic materials based upon Ni-Ti alloys are an emerging solution. Ni-Ti alloys are intermetallic materials that possess characteristics of both metals and ceramics. Ni-Ti alloys have intrinsically good aqueous corrosion resistance (they cannot rust), high hardness, relatively low elastic modulus, are chemically inert and readily lubricated. Ni-Ti alloys also belong to the family of superelastics and, despite high hardness, are able to withstand large strains without suffering permanent plastic deformation. In this paper, the use of hard, resilient Ni-Ti alloys for corrosion-proof, shockproof bearing and gear applications are presented. Through a series of bearing and gear development projects, it is demonstrated that Ni-Tis unique blend of materials properties lead to significantly improved load capacity, reduced weight and intrinsic corrosion resistance not found in any other bearing materials. Ni-Ti thus represents a new materials solution to demanding tribological applications.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Dellacorte, Christopher
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 6, 2014
Publication Date
June 8, 2014
Subject Category
Mechanical Engineering
Metals And Metallic Materials
Report/Patent Number
Meeting Information
Meeting: 2014 CIMTEC International Ceramics Conference
Location: Florence
Country: Italy
Start Date: June 8, 2014
End Date: June 13, 2014
Sponsors: Consiglio Nazionale delle Ricerche, European Cooperation in the Field of Scientific and Technical Research, International Council of Scientific Unions, Agenzia Nazionale per le Nuove Tecnologie, l'Energia e lo Sviluppo Economico Sostenibile
Funding Number(s)
WBS: WBS 401769.
Distribution Limits
Work of the US Gov. Public Use Permitted.
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