Influence of Plastic Deformation on Low Temperature Surface Hardening of Austenitic and Precipitation Hardening Stainless Steels by Gaseous Nitriding

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This article addresses an investigation of the influence of plastic deformation on low temperature surface hardening by gaseous nitriding of three commercial austenitic stainless steels: AISI 304, EN 1.4369 and Sandvik Nanoflex® with various degrees of austenite stability. The materials were plastically deformed to different equivalent strains by uniaxial tension. Gaseous nitriding of the strained material was performed in ammonia gas at atmospheric pressure at 703 K (430 °C) and 693 K (420 °C) depending on the material. Microstructural characterization of the as-deformed states and the nitrided case included X-ray diffraction analysis, reflected light microscopy and microhardness. The results demonstrate that a case of expanded austenite develops and that, in particular, strain-induced martensite has a large influence on the nitrided zone.
Original languageEnglish
JournalH T M
Volume70
Issue number5
Pages (from-to)228-238
ISSN1867-2493
DOIs
Publication statusPublished - 2015

Cite this

@article{582003593f9a49e69418d88557619c17,
title = "Influence of Plastic Deformation on Low Temperature Surface Hardening of Austenitic and Precipitation Hardening Stainless Steels by Gaseous Nitriding",
abstract = "This article addresses an investigation of the influence of plastic deformation on low temperature surface hardening by gaseous nitriding of three commercial austenitic stainless steels: AISI 304, EN 1.4369 and Sandvik Nanoflex{\circledR} with various degrees of austenite stability. The materials were plastically deformed to different equivalent strains by uniaxial tension. Gaseous nitriding of the strained material was performed in ammonia gas at atmospheric pressure at 703 K (430 °C) and 693 K (420 °C) depending on the material. Microstructural characterization of the as-deformed states and the nitrided case included X-ray diffraction analysis, reflected light microscopy and microhardness. The results demonstrate that a case of expanded austenite develops and that, in particular, strain-induced martensite has a large influence on the nitrided zone.",
author = "Federico Bottoli and Grethe Winther and Christiansen, {Thomas Lundin} and Somers, {Marcel A. J.}",
year = "2015",
doi = "10.3139/105.110269",
language = "English",
volume = "70",
pages = "228--238",
journal = "H T M",
issn = "1867-2493",
publisher = "Carl Hanser Verlag GmbH & Co. KG",
number = "5",

}

Influence of Plastic Deformation on Low Temperature Surface Hardening of Austenitic and Precipitation Hardening Stainless Steels by Gaseous Nitriding. / Bottoli, Federico; Winther, Grethe; Christiansen, Thomas Lundin; Somers, Marcel A. J.

In: H T M, Vol. 70, No. 5, 2015, p. 228-238.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Influence of Plastic Deformation on Low Temperature Surface Hardening of Austenitic and Precipitation Hardening Stainless Steels by Gaseous Nitriding

AU - Bottoli, Federico

AU - Winther, Grethe

AU - Christiansen, Thomas Lundin

AU - Somers, Marcel A. J.

PY - 2015

Y1 - 2015

N2 - This article addresses an investigation of the influence of plastic deformation on low temperature surface hardening by gaseous nitriding of three commercial austenitic stainless steels: AISI 304, EN 1.4369 and Sandvik Nanoflex® with various degrees of austenite stability. The materials were plastically deformed to different equivalent strains by uniaxial tension. Gaseous nitriding of the strained material was performed in ammonia gas at atmospheric pressure at 703 K (430 °C) and 693 K (420 °C) depending on the material. Microstructural characterization of the as-deformed states and the nitrided case included X-ray diffraction analysis, reflected light microscopy and microhardness. The results demonstrate that a case of expanded austenite develops and that, in particular, strain-induced martensite has a large influence on the nitrided zone.

AB - This article addresses an investigation of the influence of plastic deformation on low temperature surface hardening by gaseous nitriding of three commercial austenitic stainless steels: AISI 304, EN 1.4369 and Sandvik Nanoflex® with various degrees of austenite stability. The materials were plastically deformed to different equivalent strains by uniaxial tension. Gaseous nitriding of the strained material was performed in ammonia gas at atmospheric pressure at 703 K (430 °C) and 693 K (420 °C) depending on the material. Microstructural characterization of the as-deformed states and the nitrided case included X-ray diffraction analysis, reflected light microscopy and microhardness. The results demonstrate that a case of expanded austenite develops and that, in particular, strain-induced martensite has a large influence on the nitrided zone.

U2 - 10.3139/105.110269

DO - 10.3139/105.110269

M3 - Journal article

VL - 70

SP - 228

EP - 238

JO - H T M

JF - H T M

SN - 1867-2493

IS - 5

ER -