Title

Furnaceless Sintering of P/M Materials through Friction Stirring

Abstract

Processes that combine thermal processing and mechanical processing, such as hot extrusion and hot pressing, are well known to be capable of fully densifying particulate materials. This is particularly useful for prealloyed materials where cold compaction would be difficult. A new application of friction stir processing has been developed to provide thermomechanical processing of particulate materials leading to densification of green materials. As the heat is generated solely by the mechanical action of the tool, no furnace is needed and the energy costs are proportionally lower. Temperature is controlled by machine parameters and the material. Materials range from low sintering temperature materials such as aluminum to steels. Since diffusion is enhanced by the mechanical work, inhomogeneous materials are homogenized. Mechanical properties are enhanced as would be expected from the high density and chemical homogeneity. Examples of materials processed in this manner will be given and the mechanisms for densification discussed.

Meeting Name

2006 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2006 (2006: Jun. 18-21, San Diego, CA)

Department(s)

Materials Science and Engineering

Keywords and Phrases

Chemical Homogeneity; Friction Stir Processing; Inhomogeneous Materials; Low Sintering Temperature; Machine Parameters; Mechanical Processing; Particulate Materials; Thermo-Mechanical Processing; Hot Pressing; Mechanical Properties; Powder Metallurgy; Sintering; Materials

International Standard Book Number (ISBN)

9780976205760

International Standard Serial Number (ISSN)

1065-5824

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2006 Metal Powder Industries Federation, All rights reserved.

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