Continuous grain refinement using severe torsion straining process

Katsuaki Nakamura, Koji Neishi, Kenji Kaneko, Michihiko Nakagaki, Zenji Horita

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

8 Citations (Scopus)

Abstract

This study presents a new rapid continuous process for grain refinement in metallic materials through severe plastic deformation (SPD). The new process, designated in this study the severe torsion straining process (STSP), is applicable to a wide range of alloys based on aluminum, magnesium and copper including carbon steel. This process consists of producing a local heated zone in a rod and cooling both sides of the heated zone by spray water while rotating one end with the other. Thus, torsion strain is introduced in the local heated zone. The STSP can be continuous because the straining is achieved while the rod is shifted along the longitudinal axis of die rod. Furthermore, the process requires no die, suggesting a potential for commercialization of grain refinement through SPD. In this study, STSP was applied to an Al-Mg alloy and a Mg-Al-Zn alloy. It is shown that STSP is effective for both alloys so that the grain size is reduced to ∼1.5 μm for the Al alloy and ∼0.9 μm for the Mg alloy. Tensile testing showed that the strength is increased with a minimal decrease in uniform elongation. There is a critical ratio between rotation speed and moving speed, which defines the feasibility of STSP operation without breaking the rod. The grain size tends to be lowered as the ratio is close to the critical value.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
Pages385-390
Number of pages6
Volume503-504
Publication statusPublished - 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)02555476

Other

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

Fingerprint

Grain refinement
Torsional stress
Plastic deformation
Tensile testing
Aluminum
Magnesium
Carbon steel
Copper
Elongation
Cooling
Water

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Nakamura, K., Neishi, K., Kaneko, K., Nakagaki, M., & Horita, Z. (2006). Continuous grain refinement using severe torsion straining process. In Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation (Vol. 503-504, pp. 385-390). (Materials Science Forum; Vol. 503-504).

Continuous grain refinement using severe torsion straining process. / Nakamura, Katsuaki; Neishi, Koji; Kaneko, Kenji; Nakagaki, Michihiko; Horita, Zenji.

Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. Vol. 503-504 2006. p. 385-390 (Materials Science Forum; Vol. 503-504).

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

Nakamura, K, Neishi, K, Kaneko, K, Nakagaki, M & Horita, Z 2006, Continuous grain refinement using severe torsion straining process. in Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. vol. 503-504, Materials Science Forum, vol. 503-504, pp. 385-390, 3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3, Fukuoka, Japan, 9/22/05.
Nakamura K, Neishi K, Kaneko K, Nakagaki M, Horita Z. Continuous grain refinement using severe torsion straining process. In Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. Vol. 503-504. 2006. p. 385-390. (Materials Science Forum).
Nakamura, Katsuaki ; Neishi, Koji ; Kaneko, Kenji ; Nakagaki, Michihiko ; Horita, Zenji. / Continuous grain refinement using severe torsion straining process. Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation. Vol. 503-504 2006. pp. 385-390 (Materials Science Forum).
@inproceedings{bd95fc9873424cf3881b7ed1038a6a67,
title = "Continuous grain refinement using severe torsion straining process",
abstract = "This study presents a new rapid continuous process for grain refinement in metallic materials through severe plastic deformation (SPD). The new process, designated in this study the severe torsion straining process (STSP), is applicable to a wide range of alloys based on aluminum, magnesium and copper including carbon steel. This process consists of producing a local heated zone in a rod and cooling both sides of the heated zone by spray water while rotating one end with the other. Thus, torsion strain is introduced in the local heated zone. The STSP can be continuous because the straining is achieved while the rod is shifted along the longitudinal axis of die rod. Furthermore, the process requires no die, suggesting a potential for commercialization of grain refinement through SPD. In this study, STSP was applied to an Al-Mg alloy and a Mg-Al-Zn alloy. It is shown that STSP is effective for both alloys so that the grain size is reduced to ∼1.5 μm for the Al alloy and ∼0.9 μm for the Mg alloy. Tensile testing showed that the strength is increased with a minimal decrease in uniform elongation. There is a critical ratio between rotation speed and moving speed, which defines the feasibility of STSP operation without breaking the rod. The grain size tends to be lowered as the ratio is close to the critical value.",
author = "Katsuaki Nakamura and Koji Neishi and Kenji Kaneko and Michihiko Nakagaki and Zenji Horita",
year = "2006",
language = "English",
isbn = "0878499857",
volume = "503-504",
series = "Materials Science Forum",
pages = "385--390",
booktitle = "Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation",

}

TY - GEN

T1 - Continuous grain refinement using severe torsion straining process

AU - Nakamura, Katsuaki

AU - Neishi, Koji

AU - Kaneko, Kenji

AU - Nakagaki, Michihiko

AU - Horita, Zenji

PY - 2006

Y1 - 2006

N2 - This study presents a new rapid continuous process for grain refinement in metallic materials through severe plastic deformation (SPD). The new process, designated in this study the severe torsion straining process (STSP), is applicable to a wide range of alloys based on aluminum, magnesium and copper including carbon steel. This process consists of producing a local heated zone in a rod and cooling both sides of the heated zone by spray water while rotating one end with the other. Thus, torsion strain is introduced in the local heated zone. The STSP can be continuous because the straining is achieved while the rod is shifted along the longitudinal axis of die rod. Furthermore, the process requires no die, suggesting a potential for commercialization of grain refinement through SPD. In this study, STSP was applied to an Al-Mg alloy and a Mg-Al-Zn alloy. It is shown that STSP is effective for both alloys so that the grain size is reduced to ∼1.5 μm for the Al alloy and ∼0.9 μm for the Mg alloy. Tensile testing showed that the strength is increased with a minimal decrease in uniform elongation. There is a critical ratio between rotation speed and moving speed, which defines the feasibility of STSP operation without breaking the rod. The grain size tends to be lowered as the ratio is close to the critical value.

AB - This study presents a new rapid continuous process for grain refinement in metallic materials through severe plastic deformation (SPD). The new process, designated in this study the severe torsion straining process (STSP), is applicable to a wide range of alloys based on aluminum, magnesium and copper including carbon steel. This process consists of producing a local heated zone in a rod and cooling both sides of the heated zone by spray water while rotating one end with the other. Thus, torsion strain is introduced in the local heated zone. The STSP can be continuous because the straining is achieved while the rod is shifted along the longitudinal axis of die rod. Furthermore, the process requires no die, suggesting a potential for commercialization of grain refinement through SPD. In this study, STSP was applied to an Al-Mg alloy and a Mg-Al-Zn alloy. It is shown that STSP is effective for both alloys so that the grain size is reduced to ∼1.5 μm for the Al alloy and ∼0.9 μm for the Mg alloy. Tensile testing showed that the strength is increased with a minimal decrease in uniform elongation. There is a critical ratio between rotation speed and moving speed, which defines the feasibility of STSP operation without breaking the rod. The grain size tends to be lowered as the ratio is close to the critical value.

UR - http://www.scopus.com/inward/record.url?scp=35248899555&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35248899555&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0878499857

SN - 9780878499854

VL - 503-504

T3 - Materials Science Forum

SP - 385

EP - 390

BT - Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation

ER -