Development of intense plastic strain and ultrafine grains in thicker samples processed by high-pressure torsion and high-pressure sliding

Hideaki Iwaoka, Tadayoshi Fujioka, Yosuke Harai, Zenji Horita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Intense plastic strain is imparted into disk-and ring-shape samples using high-pressure torsion (HPT) which is known as a typical process of severe plastic deformation. The grain size is refined to the submicrometer and/or nanometer range. The grain refinement is also achieved using high-pressure sliding (HPS) which was developed recently for rectangular sheet samples under high pressure as in HPT. However, the samples with the thickness thinner than 1 mm are usually used for both HPT and HPS processes but no attempt has been made for samples with the thickness thicker than 1 mm. This study is then initiated to investigate how homogeneously the strain is developed and the grain refinement is achieved in the thicker samples. High purity Al (99.99%) is used with ring-shape and rectangular sheet samples having thicknesses of 2 and 4 mm. It is shown that a region of intense plastic strain develops at the center height and expands to both upper and lower edges with straining. The grain refinement is achieved at such an intense plastic region with dislocation-free grains with the sizes of a few micrometers.

Original languageEnglish
Pages (from-to)412-418
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume75
Issue number7
DOIs
Publication statusPublished - Jul 1 2011

Fingerprint

Torsional stress
torsion
sliding
Plastic deformation
plastics
Grain refinement
rings
plastic deformation
Ultrafine
micrometers
purity
grain size
Plastics

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Development of intense plastic strain and ultrafine grains in thicker samples processed by high-pressure torsion and high-pressure sliding. / Iwaoka, Hideaki; Fujioka, Tadayoshi; Harai, Yosuke; Horita, Zenji.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 75, No. 7, 01.07.2011, p. 412-418.

Research output: Contribution to journalArticle

@article{324fa2a6cf9d4ff881c07ee088bda987,
title = "Development of intense plastic strain and ultrafine grains in thicker samples processed by high-pressure torsion and high-pressure sliding",
abstract = "Intense plastic strain is imparted into disk-and ring-shape samples using high-pressure torsion (HPT) which is known as a typical process of severe plastic deformation. The grain size is refined to the submicrometer and/or nanometer range. The grain refinement is also achieved using high-pressure sliding (HPS) which was developed recently for rectangular sheet samples under high pressure as in HPT. However, the samples with the thickness thinner than 1 mm are usually used for both HPT and HPS processes but no attempt has been made for samples with the thickness thicker than 1 mm. This study is then initiated to investigate how homogeneously the strain is developed and the grain refinement is achieved in the thicker samples. High purity Al (99.99{\%}) is used with ring-shape and rectangular sheet samples having thicknesses of 2 and 4 mm. It is shown that a region of intense plastic strain develops at the center height and expands to both upper and lower edges with straining. The grain refinement is achieved at such an intense plastic region with dislocation-free grains with the sizes of a few micrometers.",
author = "Hideaki Iwaoka and Tadayoshi Fujioka and Yosuke Harai and Zenji Horita",
year = "2011",
month = "7",
day = "1",
doi = "10.2320/jinstmet.75.412",
language = "English",
volume = "75",
pages = "412--418",
journal = "Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals",
issn = "0021-4876",
publisher = "公益社団法人 日本金属学会",
number = "7",

}

TY - JOUR

T1 - Development of intense plastic strain and ultrafine grains in thicker samples processed by high-pressure torsion and high-pressure sliding

AU - Iwaoka, Hideaki

AU - Fujioka, Tadayoshi

AU - Harai, Yosuke

AU - Horita, Zenji

PY - 2011/7/1

Y1 - 2011/7/1

N2 - Intense plastic strain is imparted into disk-and ring-shape samples using high-pressure torsion (HPT) which is known as a typical process of severe plastic deformation. The grain size is refined to the submicrometer and/or nanometer range. The grain refinement is also achieved using high-pressure sliding (HPS) which was developed recently for rectangular sheet samples under high pressure as in HPT. However, the samples with the thickness thinner than 1 mm are usually used for both HPT and HPS processes but no attempt has been made for samples with the thickness thicker than 1 mm. This study is then initiated to investigate how homogeneously the strain is developed and the grain refinement is achieved in the thicker samples. High purity Al (99.99%) is used with ring-shape and rectangular sheet samples having thicknesses of 2 and 4 mm. It is shown that a region of intense plastic strain develops at the center height and expands to both upper and lower edges with straining. The grain refinement is achieved at such an intense plastic region with dislocation-free grains with the sizes of a few micrometers.

AB - Intense plastic strain is imparted into disk-and ring-shape samples using high-pressure torsion (HPT) which is known as a typical process of severe plastic deformation. The grain size is refined to the submicrometer and/or nanometer range. The grain refinement is also achieved using high-pressure sliding (HPS) which was developed recently for rectangular sheet samples under high pressure as in HPT. However, the samples with the thickness thinner than 1 mm are usually used for both HPT and HPS processes but no attempt has been made for samples with the thickness thicker than 1 mm. This study is then initiated to investigate how homogeneously the strain is developed and the grain refinement is achieved in the thicker samples. High purity Al (99.99%) is used with ring-shape and rectangular sheet samples having thicknesses of 2 and 4 mm. It is shown that a region of intense plastic strain develops at the center height and expands to both upper and lower edges with straining. The grain refinement is achieved at such an intense plastic region with dislocation-free grains with the sizes of a few micrometers.

UR - http://www.scopus.com/inward/record.url?scp=80052209372&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052209372&partnerID=8YFLogxK

U2 - 10.2320/jinstmet.75.412

DO - 10.2320/jinstmet.75.412

M3 - Article

VL - 75

SP - 412

EP - 418

JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

SN - 0021-4876

IS - 7

ER -