Strengthening in nanostructured 2024 aluminum alloy and its composites containing carbon nanotubes

H. J. Choi, B. H. Min, J. H. Shin, D. H. Bae

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

The ultrafine-grained 2024 aluminum alloy (A2024) and A2024 matrix composites containing carbon nanotubes (CNTs) are developed. Three strengthening strategies of grain boundary hardening, age hardening and hardening by CNTs are employed. First, grain size of A2024 is effectively reduced using a ball-milling technique and A2024 with a grain size of 100 nm exhibits a yield stress of ∼560 MPa, exhibiting a well agreement with the Hall-Petch relation. CNTs also have a great effect for strengthening. The A2024 matrix composite containing 3 vol.% CNTs shows a yield stress of ∼780 MPa with 2% tensile elongation to failure. Hardness is further increased after aging. The nanostructured composite shows its peak hardness after 4 h of aging because the refined grain boundaries and CNTs act as a pathway for diffusion of atoms with stimulating the aging process. The composite in the present study has great potential for application as structural materials in industry.

Original languageEnglish
Pages (from-to)1438-1444
Number of pages7
JournalComposites Part A: Applied Science and Manufacturing
Volume42
Issue number10
DOIs
Publication statusPublished - 2011 Oct 1

Fingerprint

Carbon Nanotubes
Strengthening (metal)
Aluminum alloys
Carbon nanotubes
Composite materials
Aging of materials
Yield stress
Hardening
Grain boundaries
Hardness
Age hardening
Ball milling
Elongation
Atoms
Industry

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials

Cite this

@article{4e5037f7e8d946e0862a3f355e95ce7b,
title = "Strengthening in nanostructured 2024 aluminum alloy and its composites containing carbon nanotubes",
abstract = "The ultrafine-grained 2024 aluminum alloy (A2024) and A2024 matrix composites containing carbon nanotubes (CNTs) are developed. Three strengthening strategies of grain boundary hardening, age hardening and hardening by CNTs are employed. First, grain size of A2024 is effectively reduced using a ball-milling technique and A2024 with a grain size of 100 nm exhibits a yield stress of ∼560 MPa, exhibiting a well agreement with the Hall-Petch relation. CNTs also have a great effect for strengthening. The A2024 matrix composite containing 3 vol.{\%} CNTs shows a yield stress of ∼780 MPa with 2{\%} tensile elongation to failure. Hardness is further increased after aging. The nanostructured composite shows its peak hardness after 4 h of aging because the refined grain boundaries and CNTs act as a pathway for diffusion of atoms with stimulating the aging process. The composite in the present study has great potential for application as structural materials in industry.",
author = "Choi, {H. J.} and Min, {B. H.} and Shin, {J. H.} and Bae, {D. H.}",
year = "2011",
month = "10",
day = "1",
doi = "10.1016/j.compositesa.2011.06.008",
language = "English",
volume = "42",
pages = "1438--1444",
journal = "Composites - Part A: Applied Science and Manufacturing",
issn = "1359-835X",
publisher = "Elsevier Limited",
number = "10",

}

Strengthening in nanostructured 2024 aluminum alloy and its composites containing carbon nanotubes. / Choi, H. J.; Min, B. H.; Shin, J. H.; Bae, D. H.

In: Composites Part A: Applied Science and Manufacturing, Vol. 42, No. 10, 01.10.2011, p. 1438-1444.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Strengthening in nanostructured 2024 aluminum alloy and its composites containing carbon nanotubes

AU - Choi, H. J.

AU - Min, B. H.

AU - Shin, J. H.

AU - Bae, D. H.

PY - 2011/10/1

Y1 - 2011/10/1

N2 - The ultrafine-grained 2024 aluminum alloy (A2024) and A2024 matrix composites containing carbon nanotubes (CNTs) are developed. Three strengthening strategies of grain boundary hardening, age hardening and hardening by CNTs are employed. First, grain size of A2024 is effectively reduced using a ball-milling technique and A2024 with a grain size of 100 nm exhibits a yield stress of ∼560 MPa, exhibiting a well agreement with the Hall-Petch relation. CNTs also have a great effect for strengthening. The A2024 matrix composite containing 3 vol.% CNTs shows a yield stress of ∼780 MPa with 2% tensile elongation to failure. Hardness is further increased after aging. The nanostructured composite shows its peak hardness after 4 h of aging because the refined grain boundaries and CNTs act as a pathway for diffusion of atoms with stimulating the aging process. The composite in the present study has great potential for application as structural materials in industry.

AB - The ultrafine-grained 2024 aluminum alloy (A2024) and A2024 matrix composites containing carbon nanotubes (CNTs) are developed. Three strengthening strategies of grain boundary hardening, age hardening and hardening by CNTs are employed. First, grain size of A2024 is effectively reduced using a ball-milling technique and A2024 with a grain size of 100 nm exhibits a yield stress of ∼560 MPa, exhibiting a well agreement with the Hall-Petch relation. CNTs also have a great effect for strengthening. The A2024 matrix composite containing 3 vol.% CNTs shows a yield stress of ∼780 MPa with 2% tensile elongation to failure. Hardness is further increased after aging. The nanostructured composite shows its peak hardness after 4 h of aging because the refined grain boundaries and CNTs act as a pathway for diffusion of atoms with stimulating the aging process. The composite in the present study has great potential for application as structural materials in industry.

UR - http://www.scopus.com/inward/record.url?scp=80052022497&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052022497&partnerID=8YFLogxK

U2 - 10.1016/j.compositesa.2011.06.008

DO - 10.1016/j.compositesa.2011.06.008

M3 - Article

AN - SCOPUS:80052022497

VL - 42

SP - 1438

EP - 1444

JO - Composites - Part A: Applied Science and Manufacturing

JF - Composites - Part A: Applied Science and Manufacturing

SN - 1359-835X

IS - 10

ER -