Effect of cryorolling on the microstructure and tensile properties of bulk nano-austenitic stainless steel

Barna Roy; Rajesh Kumar; Jayanta Das

doi:10.1016/j.msea.2015.02.050

Effect of cryorolling on the microstructure and tensile properties of bulk nano-austenitic stainless steel

Barna Roy, Rajesh Kumar, Jayanta Das

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

63 Scopus citations

Abstract

We report the synthesis of nanostructured austenitic AISI 304L stainless steel (SS) through cryorolling (CR) and reversion annealing in the temperature range of 700-800. °C. Severe CR at sub-zero temperature promotes twinning in γ-austenite, which transform into α-martensite with lath thickness of 50-100. nm. Whereas, 50-300. nm size γ-grains recrystallize in nano-twinned α[U+05F3] through reversion annealing as confirmed by transmission electron microscopy (TEM) and electron back scattered diffraction (EBSD) imaging. The evolution of highly processable bulk nano-austenitic SS with bimodal grain size distribution on achieving high strength (~1295. MPa), large tensile ductility (~0.47), and true necking strain of 0.59, have been discussed.

Original language	English
Pages (from-to)	241-247
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	631
DOIs	https://doi.org/10.1016/j.msea.2015.02.050
State	Published - 7 Apr 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier B.V.

Keywords

304L stainless steel
Electron microscopy
Grain refinement
Nanostructured materials
Twinning
X-ray diffraction

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10.1016/j.msea.2015.02.050

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title = "Effect of cryorolling on the microstructure and tensile properties of bulk nano-austenitic stainless steel",

abstract = "We report the synthesis of nanostructured austenitic AISI 304L stainless steel (SS) through cryorolling (CR) and reversion annealing in the temperature range of 700-800. °C. Severe CR at sub-zero temperature promotes twinning in γ-austenite, which transform into α-martensite with lath thickness of 50-100. nm. Whereas, 50-300. nm size γ-grains recrystallize in nano-twinned α[U+05F3] through reversion annealing as confirmed by transmission electron microscopy (TEM) and electron back scattered diffraction (EBSD) imaging. The evolution of highly processable bulk nano-austenitic SS with bimodal grain size distribution on achieving high strength (~1295. MPa), large tensile ductility (~0.47), and true necking strain of 0.59, have been discussed.",

keywords = "304L stainless steel, Electron microscopy, Grain refinement, Nanostructured materials, Twinning, X-ray diffraction",

author = "Barna Roy and Rajesh Kumar and Jayanta Das",

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doi = "10.1016/j.msea.2015.02.050",

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AU - Roy, Barna

AU - Kumar, Rajesh

AU - Das, Jayanta

PY - 2015/4/7

Y1 - 2015/4/7

N2 - We report the synthesis of nanostructured austenitic AISI 304L stainless steel (SS) through cryorolling (CR) and reversion annealing in the temperature range of 700-800. °C. Severe CR at sub-zero temperature promotes twinning in γ-austenite, which transform into α-martensite with lath thickness of 50-100. nm. Whereas, 50-300. nm size γ-grains recrystallize in nano-twinned α[U+05F3] through reversion annealing as confirmed by transmission electron microscopy (TEM) and electron back scattered diffraction (EBSD) imaging. The evolution of highly processable bulk nano-austenitic SS with bimodal grain size distribution on achieving high strength (~1295. MPa), large tensile ductility (~0.47), and true necking strain of 0.59, have been discussed.

AB - We report the synthesis of nanostructured austenitic AISI 304L stainless steel (SS) through cryorolling (CR) and reversion annealing in the temperature range of 700-800. °C. Severe CR at sub-zero temperature promotes twinning in γ-austenite, which transform into α-martensite with lath thickness of 50-100. nm. Whereas, 50-300. nm size γ-grains recrystallize in nano-twinned α[U+05F3] through reversion annealing as confirmed by transmission electron microscopy (TEM) and electron back scattered diffraction (EBSD) imaging. The evolution of highly processable bulk nano-austenitic SS with bimodal grain size distribution on achieving high strength (~1295. MPa), large tensile ductility (~0.47), and true necking strain of 0.59, have been discussed.

KW - 304L stainless steel

KW - Electron microscopy

KW - Grain refinement

KW - Nanostructured materials

KW - Twinning

KW - X-ray diffraction

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JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Effect of cryorolling on the microstructure and tensile properties of bulk nano-austenitic stainless steel

Abstract

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Keywords

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