Furnaceless Sintering of P/M Materials through Friction Stirring
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.
J. W. Newkirk and A. Jambunathan, "Furnaceless Sintering of P/M Materials through Friction Stirring," Advances in Powder Metallurgy and Particulate Materials, pp. 9106-9113, Metal Powder Industries Federation, Jun 2006.
2006 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2006 (2006: Jun. 18-21, San Diego, CA)
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)
International Standard Serial Number (ISSN)
Article - Conference proceedings
© 2006 Metal Powder Industries Federation, All rights reserved.
01 Jun 2006