Evolution of microstructure, phase composition and hardness in 316L stainless steel processed by high-pressure torsion
Evolution of microstructure, phase composition and hardness in 316L stainless steel processed by high-pressure torsion
The evolution of phase composition, microstructure and hardness in 316L austenitic stainless steel processed by high-pressure torsion (HPT) was studied up to 20 turns. It was revealed that simultaneous grain refinement and phase transformation occur during HPT-processing. The ?-austenite in the initial material transformed gradually to ?-and ?’-martensites due to deformation. After 20 turns of HPT the main phase was ?’-martensite. The initial grain size of ~42 ?m was refined to ~48 nm while the dislocation density increased to ~143 × 1014 m-2 in the ?’-martensite phase at the disk periphery processed by 20 turns. The microstructure and hardness along the disk radius became more homogeneous with increasing numbers of turns. An approximately homogeneous hardness distribution with a saturation value of ~6140 MPa was achieved in 20 turns.
502-507
El-Tahawy, Moustafa
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Gubicza, Jenő
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Huang, Yi
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Choi, Hye Lim
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Choe, Hee Man
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Lábár, János L.
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Langdon, Terence G.
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January 2017
El-Tahawy, Moustafa
ba005a20-de7f-452f-8db8-7645456dae9d
Gubicza, Jenő
046ca28c-f226-40bc-a510-9f1bc0a3a29d
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Choi, Hye Lim
acb8e272-863e-4785-8e4a-be11450456b0
Choe, Hee Man
eb2c14ed-93f7-4e9b-b9a4-84109e4f2cbe
Lábár, János L.
e623b9fd-4dfe-438c-af04-6665b1ecc67c
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
El-Tahawy, Moustafa, Gubicza, Jenő, Huang, Yi, Choi, Hye Lim, Choe, Hee Man, Lábár, János L. and Langdon, Terence G.
(2017)
Evolution of microstructure, phase composition and hardness in 316L stainless steel processed by high-pressure torsion.
Materials Science Forum, 879, .
(doi:10.4028/www.scientific.net/MSF.879.502).
Abstract
The evolution of phase composition, microstructure and hardness in 316L austenitic stainless steel processed by high-pressure torsion (HPT) was studied up to 20 turns. It was revealed that simultaneous grain refinement and phase transformation occur during HPT-processing. The ?-austenite in the initial material transformed gradually to ?-and ?’-martensites due to deformation. After 20 turns of HPT the main phase was ?’-martensite. The initial grain size of ~42 ?m was refined to ~48 nm while the dislocation density increased to ~143 × 1014 m-2 in the ?’-martensite phase at the disk periphery processed by 20 turns. The microstructure and hardness along the disk radius became more homogeneous with increasing numbers of turns. An approximately homogeneous hardness distribution with a saturation value of ~6140 MPa was achieved in 20 turns.
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Accepted/In Press date: 23 September 2016
e-pub ahead of print date: 15 November 2016
Published date: January 2017
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 402916
URI: http://eprints.soton.ac.uk/id/eprint/402916
ISSN: 1662-9752
PURE UUID: 932ce735-02c6-4bf0-8dfd-fafa6f8b1e91
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Date deposited: 18 Nov 2016 14:29
Last modified: 16 Mar 2024 03:28
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Contributors
Author:
Moustafa El-Tahawy
Author:
Jenő Gubicza
Author:
Yi Huang
Author:
Hye Lim Choi
Author:
Hee Man Choe
Author:
János L. Lábár
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