Strengthening of A2024 alloy by high-pressure torsion and subsequent aging

Intan Fadhlina Mohamed; Takahiro Masuda; Seungwon Lee; Kaveh Edalati; Zenji Horita; Shoichi Hirosawa; Kenji Matsuda; Daisuke Terada; Mohd Zaidi Omar

doi:10.1016/j.msea.2017.07.083

Strengthening of A2024 alloy by high-pressure torsion and subsequent aging

Intan Fadhlina Mohamed^*, Takahiro Masuda, Seungwon Lee, Kaveh Edalati, Zenji Horita, Shoichi Hirosawa, Kenji Matsuda, Daisuke Terada, Mohd Zaidi Omar

^*Corresponding author for this work

Materials Design and Engineering

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6 GPa for 0.75, 1 and 5 turns with a rotation speed of 1 rpm at room temperature and this results in a significant grain size reduction to a grain size of ~ 240 ± 80 nm. The hardness sharply increases with imposing strain at an early stage but level off after 5 turns. Further aging at temperatures of 373 K and 423 K leads to extra hardening above the elevated hardness of the HPT-processed condition. Components contributing to the strengthening were evaluated in terms of grain refinement and fine precipitation including the contributions from dislocation accumulation and solid solution. In this study, a conclusion is reached such that simultaneous strengthening due to grain refinement and fine precipitation is achieved by application of HPT processing and subsequent aging.

Original language	English
Pages (from-to)	112-118
Number of pages	7
Journal	Materials Science and Engineering A
Volume	704
DOIs	https://doi.org/10.1016/j.msea.2017.07.083
State	Published - 2017/09/17

Keywords

Aluminum alloy
High-pressure torsion
Precipitation hardening
Severe plastic deformation

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2017.07.083

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title = "Strengthening of A2024 alloy by high-pressure torsion and subsequent aging",

abstract = "An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6 GPa for 0.75, 1 and 5 turns with a rotation speed of 1 rpm at room temperature and this results in a significant grain size reduction to a grain size of ~ 240 ± 80 nm. The hardness sharply increases with imposing strain at an early stage but level off after 5 turns. Further aging at temperatures of 373 K and 423 K leads to extra hardening above the elevated hardness of the HPT-processed condition. Components contributing to the strengthening were evaluated in terms of grain refinement and fine precipitation including the contributions from dislocation accumulation and solid solution. In this study, a conclusion is reached such that simultaneous strengthening due to grain refinement and fine precipitation is achieved by application of HPT processing and subsequent aging.",

keywords = "Aluminum alloy, High-pressure torsion, Precipitation hardening, Severe plastic deformation",

author = "Mohamed, {Intan Fadhlina} and Takahiro Masuda and Seungwon Lee and Kaveh Edalati and Zenji Horita and Shoichi Hirosawa and Kenji Matsuda and Daisuke Terada and Omar, {Mohd Zaidi}",

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doi = "10.1016/j.msea.2017.07.083",

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T1 - Strengthening of A2024 alloy by high-pressure torsion and subsequent aging

AU - Mohamed, Intan Fadhlina

AU - Masuda, Takahiro

AU - Lee, Seungwon

AU - Edalati, Kaveh

AU - Horita, Zenji

AU - Hirosawa, Shoichi

AU - Matsuda, Kenji

AU - Terada, Daisuke

AU - Omar, Mohd Zaidi

PY - 2017/9/17

Y1 - 2017/9/17

N2 - An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6 GPa for 0.75, 1 and 5 turns with a rotation speed of 1 rpm at room temperature and this results in a significant grain size reduction to a grain size of ~ 240 ± 80 nm. The hardness sharply increases with imposing strain at an early stage but level off after 5 turns. Further aging at temperatures of 373 K and 423 K leads to extra hardening above the elevated hardness of the HPT-processed condition. Components contributing to the strengthening were evaluated in terms of grain refinement and fine precipitation including the contributions from dislocation accumulation and solid solution. In this study, a conclusion is reached such that simultaneous strengthening due to grain refinement and fine precipitation is achieved by application of HPT processing and subsequent aging.

AB - An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6 GPa for 0.75, 1 and 5 turns with a rotation speed of 1 rpm at room temperature and this results in a significant grain size reduction to a grain size of ~ 240 ± 80 nm. The hardness sharply increases with imposing strain at an early stage but level off after 5 turns. Further aging at temperatures of 373 K and 423 K leads to extra hardening above the elevated hardness of the HPT-processed condition. Components contributing to the strengthening were evaluated in terms of grain refinement and fine precipitation including the contributions from dislocation accumulation and solid solution. In this study, a conclusion is reached such that simultaneous strengthening due to grain refinement and fine precipitation is achieved by application of HPT processing and subsequent aging.

KW - Aluminum alloy

KW - High-pressure torsion

KW - Precipitation hardening

KW - Severe plastic deformation

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U2 - 10.1016/j.msea.2017.07.083

DO - 10.1016/j.msea.2017.07.083

M3 - 学術論文

AN - SCOPUS:85026897003

SN - 0921-5093

VL - 704

SP - 112

EP - 118

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Strengthening of A2024 alloy by high-pressure torsion and subsequent aging

Abstract

Keywords

ASJC Scopus subject areas

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