Severe plastic deformation (SPD) is a generic term describing a group of metalworking techniques involving very large strains typically involving a complex stress state or high shear, resulting in a high defect density and equiaxed "ultrafine" grain (UFG) size (d < 500 nm) or nanocrystalline (NC) structure (d < 100 nm).[1]
^Wei, Q; Cheng, S; Ramesh, K.T; Ma, E (15 September 2004). "Effect of nanocrystalline and ultrafine grain sizes on the strain rate sensitivity and activation volume: fcc versus bcc metals". Materials Science and Engineering: A. 381 (1–2): 71–79. doi:10.1016/j.msea.2004.03.064.
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Severeplasticdeformation (SPD) is a generic term describing a group of metalworking techniques involving very large strains typically involving a complex...
raising the deformation rate or improving ductility. The most common grain refinement process for HSRS research uses SeverePlasticDeformation (SPD). SPD...
equal channel angular pressing (ECAP) is one technique from the SeverePlasticDeformation (SPD) group, aimed at producing Ultra Fine Grained (UFG) material...
The cryogenic dynamic plasticdeformation creates higher fraction of the twin boundaries compared to the severeplasticdeformation. Following cryorolling...
manipulated to enhance their strengthening effects. SeverePlasticDeformation Applying severeplasticdeformation techniques, such as equal-channel angular pressing...
cups, shells or other drawn shapes by subjecting the material to severeplasticdeformation. Shown in fig is a rather deep shell that has been drawn from...
to those obtained in macroscopic Ti work pieces subjected to a severeplasticdeformation by shot peening. Coating Gregoire, J. M.; Lobovsky, M. B.; Heinz...
the plastic anisotropy to some extent, but directionality of properties is largely influenced by its fabrication history. Severeplasticdeformation: It...
(ARB) is a severeplasticdeformation (SPD) process. It is a method of rolling a stack of metal sheets, which are repeatedly rolled to a severe reduction...
structure of alloy or metal which is obtained by techniques such as severeplasticdeformation is desirable, and not changed by the high temperature, a large...
Diffraction technique: application to the characterisation of severeplasticdeformation-induced ultrafine-grained microstructures". Journal of Microscopy...
mechanical alloying using a high-energy ball mill and certain types of severeplasticdeformation processes. Nanocrystalline metals can be produced by rapid solidification...
polypropylene (PP). Polypropylene is the second-most widely produced commodity plastic (after polyethylene). Phillips Petroleum chemists J. Paul Hogan and Robert...
Due to the severeplasticdeformation of the particles, residual stresses in the deposit can accumulate, leading to distortion, deformation or cracks....
structure of alloy or metal which is obtained by techniques such as severeplasticdeformation or Powder metallurgy is desirable, and not changed by the high...
narrow zone of intense shearing strain, usually of plastic nature, developing during severedeformation of ductile materials. As an example, a soil (overconsolidated...
have. High resolution microscopy show that material put under severeplasticdeformation are characterized by significant distortions and dislocations...
and other factors. Plasticdeformation: As the crack propagates, the material near the crack undergoes significant plasticdeformation due to the local...
respectively without or with plasticdeformation prior to failure. In brittle fracture, no apparent plasticdeformation takes place before fracture. Brittle...
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