Application of high pressure torsion to bulk samples

Genki Sakai, Katsuaki Nakamura, Zenji Horita, Terence G. Langdon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

High pressure torsion (HPT) is a well-known procedure to impart severe plastic deformation (SPD) into metallic materials. It was reported that HPT produces grain sizes finer than those using other SPD processes such as equal-channel angular pressing (ECAP). However, the application of HPT has been restricted to thin disk samples. In this study, an HPT process was developed for use with bulk samples. This process is designated as Bulk-HPT for comparison with conventional Disk-HPT. Cylindrical samples of an Al-3%Mg-0.2%Sc alloy having dimensions of 10 mm in diameter and 8.6 mm in height were prepared for Bulk-HPT. The samples were strained under a pressure of 1 GPa for 2 turns at room temperature. Microstractural observations revealed that the samples contained regions having a grain size of ∼ 130 nm. Tensile testing showed a superplastic ductility ∼480 % at 673 K with an initial strain rate of 3.3×10-2 s-1.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
Pages391-396
Number of pages6
Publication statusPublished - Dec 1 2006
Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
Duration: Sep 22 2005Sep 26 2005

Publication series

NameMaterials Science Forum
Volume503-504
ISSN (Print)0255-5476

Other

Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
CountryJapan
CityFukuoka
Period9/22/059/26/05

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Sakai, G., Nakamura, K., Horita, Z., & Langdon, T. G. (2006). Application of high pressure torsion to bulk samples. In Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation (pp. 391-396). (Materials Science Forum; Vol. 503-504).