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Exceptionally high strength and good ductility in an ultrafine-grained 316L steel processed by severe plastic deformation and subsequent annealing

Exceptionally high strength and good ductility in an ultrafine-grained 316L steel processed by severe plastic deformation and subsequent annealing
Exceptionally high strength and good ductility in an ultrafine-grained 316L steel processed by severe plastic deformation and subsequent annealing
An investigation was conducted to evaluate the effect of annealing at different temperatures on the tensile properties of ultrafine-grained 316L stainless steel processed by high-pressure torsion (HPT). A “moderate-temperature” annealing at 740 K resulted in reduced strength and elongation due to the annihilation of mobile dislocations. A “high-temperature” annealing at 1000 K yielded a remarkably good combination of yield strength (~1330 MPa) and elongation to failure (~43%) which can be attributed to the almost full reversion of α’-martensite formed during HPT into γ-austenite while the grain size remained very fine with a
value of about 200 nm.
0167-577X
240-242
EI-Tahawy, Moustafa
5383d402-423d-4636-b988-8e8f1a9ad65f
Pereira, Pedro H.R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Park, Hyeji
4ebfaaae-8282-402b-bf38-bd6fcf1736ec
Choe, Heeman
712ed801-cd85-4e03-81d7-0ec986576da8
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Gubicza, Jenő
046ca28c-f226-40bc-a510-9f1bc0a3a29d
EI-Tahawy, Moustafa
5383d402-423d-4636-b988-8e8f1a9ad65f
Pereira, Pedro H.R.
9ee129fd-0e06-482d-990c-971aaf83b1d0
Huang, Yi
9f4df815-51c1-4ee8-ad63-a92bf997103e
Park, Hyeji
4ebfaaae-8282-402b-bf38-bd6fcf1736ec
Choe, Heeman
712ed801-cd85-4e03-81d7-0ec986576da8
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Gubicza, Jenő
046ca28c-f226-40bc-a510-9f1bc0a3a29d

EI-Tahawy, Moustafa, Pereira, Pedro H.R., Huang, Yi, Park, Hyeji, Choe, Heeman, Langdon, Terence G. and Gubicza, Jenő (2018) Exceptionally high strength and good ductility in an ultrafine-grained 316L steel processed by severe plastic deformation and subsequent annealing. Materials Letters, 214, 240-242. (doi:10.1016/j.matlet.2017.12.040).

Record type: Article

Abstract

An investigation was conducted to evaluate the effect of annealing at different temperatures on the tensile properties of ultrafine-grained 316L stainless steel processed by high-pressure torsion (HPT). A “moderate-temperature” annealing at 740 K resulted in reduced strength and elongation due to the annihilation of mobile dislocations. A “high-temperature” annealing at 1000 K yielded a remarkably good combination of yield strength (~1330 MPa) and elongation to failure (~43%) which can be attributed to the almost full reversion of α’-martensite formed during HPT into γ-austenite while the grain size remained very fine with a
value of about 200 nm.

Text EI-Tahawy-ML accepted manuscript_2017-12 - Accepted Manuscript
Restricted to Repository staff only until 11 December 2018.
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More information

Accepted/In Press date: 9 December 2017
e-pub ahead of print date: 11 December 2017
Published date: 1 March 2018

Identifiers

Local EPrints ID: 416753
URI: https://eprints.soton.ac.uk/id/eprint/416753
ISSN: 0167-577X
PURE UUID: 9f98d63e-60b5-4756-bfc9-5dd8c28a0934
ORCID for Yi Huang: ORCID iD orcid.org/0000-0001-9259-8123
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 08 Jan 2018 17:30
Last modified: 06 Jun 2018 12:48

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