Mechanical property evaluation of an Al-2024 alloy subjected to HPT processing
Mechanical property evaluation of an Al-2024 alloy subjected to HPT processing
An aluminum-copper alloy (Al-2024) was successfully subjected to high-pressure torsion (HPT) up to five turns at room temperature under an applied pressure of 6.0 GPa. The Al-2024 alloy is used as a fuselage structural material in the aerospace sector. Mechanical properties of the HPT-processed Al-2024 alloy were evaluated using the automated ball indentation technique. This test is based on multiple cycles of loading and unloading where a spherical indenter is used. After two and five turns of HPT, the Al-2024 alloy exhibited a UTS value of ~1014 MPa and ~1160 MPa respectively, at the edge of the samples. The microhardness was measured from edges to centers for all HPT samples. These results clearly demonstrate that processing by HPT gives a very significant increase in tensile properties and the microhardness values increase symmetrically from the centers to the edges. Following HPT, TEM examination of the five-turn HPT sample revealed the formation of high-angle grain boundaries and a large dislocation density with a reduced average grain size of ~80 nm. These results also demonstrate that high-pressure torsion is a processing tool for developing nanostructures in the Al-2024 alloy with enhanced mechanical properties
12085
Patil, Deepak C.
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Venkateswarlu, K.
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Kori, S.A.
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Das, Goutam
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Das, Mousumi
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Alhajeri, Saleh N.
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Langdon, Terence G.
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July 2014
Patil, Deepak C.
15e31ec0-b96c-4a4c-8696-08e3232304ee
Venkateswarlu, K.
5bdfe52c-a221-4f27-83fa-638f30e91bb0
Kori, S.A.
592448fc-f4cb-49a6-a9af-c218b656f79c
Das, Goutam
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Das, Mousumi
e8ed9030-b6af-40a6-8dec-986e0e139c94
Alhajeri, Saleh N.
4d3f50b6-87ab-4690-87dd-bea08fb1c77f
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Patil, Deepak C., Venkateswarlu, K., Kori, S.A., Das, Goutam, Das, Mousumi, Alhajeri, Saleh N. and Langdon, Terence G.
(2014)
Mechanical property evaluation of an Al-2024 alloy subjected to HPT processing.
IOP Conference Series: Materials Science and Engineering, 63, .
(doi:10.1088/1757-899X/63/1/012085).
Abstract
An aluminum-copper alloy (Al-2024) was successfully subjected to high-pressure torsion (HPT) up to five turns at room temperature under an applied pressure of 6.0 GPa. The Al-2024 alloy is used as a fuselage structural material in the aerospace sector. Mechanical properties of the HPT-processed Al-2024 alloy were evaluated using the automated ball indentation technique. This test is based on multiple cycles of loading and unloading where a spherical indenter is used. After two and five turns of HPT, the Al-2024 alloy exhibited a UTS value of ~1014 MPa and ~1160 MPa respectively, at the edge of the samples. The microhardness was measured from edges to centers for all HPT samples. These results clearly demonstrate that processing by HPT gives a very significant increase in tensile properties and the microhardness values increase symmetrically from the centers to the edges. Following HPT, TEM examination of the five-turn HPT sample revealed the formation of high-angle grain boundaries and a large dislocation density with a reduced average grain size of ~80 nm. These results also demonstrate that high-pressure torsion is a processing tool for developing nanostructures in the Al-2024 alloy with enhanced mechanical properties
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1757-899X_63_1_012085.pdf
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Published date: July 2014
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 368098
URI: http://eprints.soton.ac.uk/id/eprint/368098
ISSN: 1757-899X
PURE UUID: ed6164e9-83c1-4963-99a9-a92ef29150af
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Date deposited: 12 Sep 2014 10:39
Last modified: 15 Mar 2024 03:13
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Author:
Deepak C. Patil
Author:
K. Venkateswarlu
Author:
S.A. Kori
Author:
Goutam Das
Author:
Mousumi Das
Author:
Saleh N. Alhajeri
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