Observation of the reversible stabilisation of liquid phase iron during nitriding

Carl Slater; Stephen Spooner; Claire Davis; Seetharaman Sridhar

doi:10.1016/j.matlet.2016.03.045

Observation of the reversible stabilisation of liquid phase iron during nitriding

Carl Slater, Stephen Spooner, Claire Davis, Seetharaman Sridhar

University of Warwick

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Abstract

Confocal scanning laser microscopy has been used to observe in-situ cooling of Grade 1 iron whilst under a nitrogen atmosphere. Liquid iron has been stabilised to temperatures below 1400°C through nitriding at high temperatures. This has been achieved in two ways. Firstly by exposing the melt to nitrogen and observing the onset of solidification whilst cooling. Secondly, under isothermal conditions by re-melting of initially nitrogen free iron at 1400°C through the introduction of a nitrogen atmosphere. The latter process has been shown to be reversible with liquid iron being unstable once reverting back to a helium atmosphere.

Original language	English
Pages (from-to)	98-101
Number of pages	4
Journal	Materials Letters
Volume	173
Early online date	9 Mar 2016
DOIs	https://doi.org/10.1016/j.matlet.2016.03.045
Publication status	Published - 15 Jun 2016
Externally published	Yes

Bibliographical note

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Funder

The authors would like to thank EPSRC for funding (Grant number EP/M014002/1) and also WMG for their support and facilities.

Keywords

Liquid steel
Nitriding
In-situ observation
Phase balance

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10.1016/j.matlet.2016.03.045Licence: CC BY

PublishedFinal published version, 1.52 MBLicence: CC BY

Cite this

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title = "Observation of the reversible stabilisation of liquid phase iron during nitriding",

abstract = "Confocal scanning laser microscopy has been used to observe in-situ cooling of Grade 1 iron whilst under a nitrogen atmosphere. Liquid iron has been stabilised to temperatures below 1400°C through nitriding at high temperatures. This has been achieved in two ways. Firstly by exposing the melt to nitrogen and observing the onset of solidification whilst cooling. Secondly, under isothermal conditions by re-melting of initially nitrogen free iron at 1400°C through the introduction of a nitrogen atmosphere. The latter process has been shown to be reversible with liquid iron being unstable once reverting back to a helium atmosphere.",

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author = "Carl Slater and Stephen Spooner and Claire Davis and Seetharaman Sridhar",

note = "This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).",

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T1 - Observation of the reversible stabilisation of liquid phase iron during nitriding

AU - Slater, Carl

AU - Spooner, Stephen

AU - Davis, Claire

AU - Sridhar, Seetharaman

N1 - This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

PY - 2016/6/15

Y1 - 2016/6/15

N2 - Confocal scanning laser microscopy has been used to observe in-situ cooling of Grade 1 iron whilst under a nitrogen atmosphere. Liquid iron has been stabilised to temperatures below 1400°C through nitriding at high temperatures. This has been achieved in two ways. Firstly by exposing the melt to nitrogen and observing the onset of solidification whilst cooling. Secondly, under isothermal conditions by re-melting of initially nitrogen free iron at 1400°C through the introduction of a nitrogen atmosphere. The latter process has been shown to be reversible with liquid iron being unstable once reverting back to a helium atmosphere.

AB - Confocal scanning laser microscopy has been used to observe in-situ cooling of Grade 1 iron whilst under a nitrogen atmosphere. Liquid iron has been stabilised to temperatures below 1400°C through nitriding at high temperatures. This has been achieved in two ways. Firstly by exposing the melt to nitrogen and observing the onset of solidification whilst cooling. Secondly, under isothermal conditions by re-melting of initially nitrogen free iron at 1400°C through the introduction of a nitrogen atmosphere. The latter process has been shown to be reversible with liquid iron being unstable once reverting back to a helium atmosphere.

KW - Liquid steel

KW - Nitriding

KW - In-situ observation

KW - Phase balance

UR - https://www.mendeley.com/catalogue/09c5605d-06ae-37c4-9751-889eadb6ec5b/

U2 - 10.1016/j.matlet.2016.03.045

DO - 10.1016/j.matlet.2016.03.045

M3 - Article

SN - 0167-577X

VL - 173

SP - 98

EP - 101

JO - Materials Letters

JF - Materials Letters

ER -

Observation of the reversible stabilisation of liquid phase iron during nitriding

Abstract

Bibliographical note

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Keywords

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