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HomeMaterials Science ForumMaterials Science Forum Vols. 558-559The Processing of Ultrafine-Grained Materials...

The Processing of Ultrafine-Grained Materials Using High-Pressure Torsion

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Abstract:

It is now well-established that processing through the application of severe plastic deformation (SPD) leads to a significant reduction in the grain size of a wide range of metallic materials. This paper examines the fabrication of ultrafine-grained materials using high-pressure torsion (HPT) where this process is attractive because it leads to exceptional grain refinement with grain sizes that often lie in the nanometer or submicrometer ranges. Two aspects of HPT are examined. First, processing by HPT is usually confined to samples in the form of very thin disks but recent experiments demonstrate the potential for extending HPT also to bulk samples. Second, since the strains imposed in HPT vary with the distance from the center of the disk, it is important to examine the development of inhomogeneities in disk samples processed by HPT.

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Periodical:

Materials Science Forum (Volumes 558-559)

Pages:

1283-1294

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.558-559.1283

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Online since:

October 2007

Authors:

Cheng Xu, Z. Horita, Terence G. Langdon

Keywords:

Hardness, High Pressure Torsion (HPT), Homogeneity, Severe Plastic Deformation (SPD), Ultra-Fine Grain Sizes

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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