On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography

Khushboo Rakha; Hossein Beladi; Ilana Timokhina; Xiangyuan Xiong; Saurabh Kabra; Klaus Dieter Liss; Peter Hodgson

doi:10.1016/j.msea.2013.09.055

On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography

Khushboo Rakha^*, Hossein Beladi, Ilana Timokhina, Xiangyuan Xiong, Saurabh Kabra, Klaus Dieter Liss, Peter Hodgson

^*Corresponding author for this work

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

25 Scopus citations

Abstract

In-situ neutron diffraction was employed to monitor the evolution of nano-bainitic ferrite during low temperature isothermal heat treatment of austenite. The first 10 peaks (austenite, γ and ferrite, α) were monitored during austenization, homogenisation, rapid cooling and isothermal holding at 573 K. Changes in the α-110 and γ-111 peaks were analysed to determine the volume fraction changes and hence the kinetics of the phase transformation. Asymmetry and broadening in the α-200 and γ-200 peaks were quantified to lattice parameter changes due to carbon redistribution as well as the effects of size and dislocation density. Atom Probe Tomography was then used to confirm that, despite the presence of 1.5 mass% Si, carbide formation was evident. This carbide formation is the cause of poor ductility, which is lower than expected in such steels.

Original language	English
Pages (from-to)	303-309
Number of pages	7
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	589
DOIs	https://doi.org/10.1016/j.msea.2013.09.055
State	Published - 1 Jan 2014
Externally published	Yes

Keywords

Atom probe tomography
Bainite
Neutron diffraction
Phase transformation

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10.1016/j.msea.2013.09.055

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Rakha, K., Beladi, H., Timokhina, I., Xiong, X., Kabra, S., Liss, K. D., & Hodgson, P. (2014). On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 589, 303-309. https://doi.org/10.1016/j.msea.2013.09.055

Rakha, Khushboo ; Beladi, Hossein ; Timokhina, Ilana ; Xiong, Xiangyuan ; Kabra, Saurabh ; Liss, Klaus Dieter ; Hodgson, Peter. / On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography. In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing. 2014 ; Vol. 589. pp. 303-309.

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title = "On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography",

abstract = "In-situ neutron diffraction was employed to monitor the evolution of nano-bainitic ferrite during low temperature isothermal heat treatment of austenite. The first 10 peaks (austenite, γ and ferrite, α) were monitored during austenization, homogenisation, rapid cooling and isothermal holding at 573 K. Changes in the α-110 and γ-111 peaks were analysed to determine the volume fraction changes and hence the kinetics of the phase transformation. Asymmetry and broadening in the α-200 and γ-200 peaks were quantified to lattice parameter changes due to carbon redistribution as well as the effects of size and dislocation density. Atom Probe Tomography was then used to confirm that, despite the presence of 1.5 mass% Si, carbide formation was evident. This carbide formation is the cause of poor ductility, which is lower than expected in such steels.",

keywords = "Atom probe tomography, Bainite, Neutron diffraction, Phase transformation",

author = "Khushboo Rakha and Hossein Beladi and Ilana Timokhina and Xiangyuan Xiong and Saurabh Kabra and Liss, {Klaus Dieter} and Peter Hodgson",

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year = "2014",

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day = "1",

doi = "10.1016/j.msea.2013.09.055",

language = "英语",

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Rakha, K, Beladi, H, Timokhina, I, Xiong, X, Kabra, S, Liss, KD & Hodgson, P 2014, 'On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography', Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, vol. 589, pp. 303-309. https://doi.org/10.1016/j.msea.2013.09.055

On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography. / Rakha, Khushboo; Beladi, Hossein; Timokhina, Ilana; Xiong, Xiangyuan; Kabra, Saurabh; Liss, Klaus Dieter; Hodgson, Peter.

In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 589, 01.01.2014, p. 303-309.

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

TY - JOUR

T1 - On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography

AU - Rakha, Khushboo

AU - Beladi, Hossein

AU - Timokhina, Ilana

AU - Xiong, Xiangyuan

AU - Kabra, Saurabh

AU - Liss, Klaus Dieter

AU - Hodgson, Peter

PY - 2014/1/1

Y1 - 2014/1/1

N2 - In-situ neutron diffraction was employed to monitor the evolution of nano-bainitic ferrite during low temperature isothermal heat treatment of austenite. The first 10 peaks (austenite, γ and ferrite, α) were monitored during austenization, homogenisation, rapid cooling and isothermal holding at 573 K. Changes in the α-110 and γ-111 peaks were analysed to determine the volume fraction changes and hence the kinetics of the phase transformation. Asymmetry and broadening in the α-200 and γ-200 peaks were quantified to lattice parameter changes due to carbon redistribution as well as the effects of size and dislocation density. Atom Probe Tomography was then used to confirm that, despite the presence of 1.5 mass% Si, carbide formation was evident. This carbide formation is the cause of poor ductility, which is lower than expected in such steels.

AB - In-situ neutron diffraction was employed to monitor the evolution of nano-bainitic ferrite during low temperature isothermal heat treatment of austenite. The first 10 peaks (austenite, γ and ferrite, α) were monitored during austenization, homogenisation, rapid cooling and isothermal holding at 573 K. Changes in the α-110 and γ-111 peaks were analysed to determine the volume fraction changes and hence the kinetics of the phase transformation. Asymmetry and broadening in the α-200 and γ-200 peaks were quantified to lattice parameter changes due to carbon redistribution as well as the effects of size and dislocation density. Atom Probe Tomography was then used to confirm that, despite the presence of 1.5 mass% Si, carbide formation was evident. This carbide formation is the cause of poor ductility, which is lower than expected in such steels.

KW - Atom probe tomography

KW - Bainite

KW - Neutron diffraction

KW - Phase transformation

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U2 - 10.1016/j.msea.2013.09.055

DO - 10.1016/j.msea.2013.09.055

M3 - 文章

AN - SCOPUS:84886105805

VL - 589

SP - 303

EP - 309

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

ER -

On low temperature bainite transformation characteristics using in-situ neutron diffraction and atom probe tomography

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Keywords

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