Thermal induced phase evolution of Fe–Fe3Ni functionally graded material fabricated using the wire-arc additive manufacturing process: An in-situ neutron diffraction study

Chen Shen; Xueming Hua; Mark Reid; Klaus Dieter Liss; Gang Mou; Zengxi Pan; Ye Huang; Huijun Li

doi:10.1016/j.jallcom.2020.154097

Thermal induced phase evolution of Fe–Fe₃Ni functionally graded material fabricated using the wire-arc additive manufacturing process: An in-situ neutron diffraction study

Chen Shen, Xueming Hua^*, Mark Reid, Klaus Dieter Liss, Gang Mou, Zengxi Pan, Ye Huang, Huijun Li

^*Corresponding author for this work

Materials Science and Engineering

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

12 Scopus citations

Abstract

In the present research an Fe–Fe₃Ni functionally graded material has been fabricated using an innovative wire-arc additive manufacturing process. Considering the residual bcc-α-Fe in the bulk material, a homogenization heat treatment is conducted to the as-fabricated alloy to transform the residual bcc lattice into fcc structure. During the entire heat treatment, the phase evolution process in Fe–Fe₃Ni functionally graded material is in-situ characterized using the high-intensity neutron diffraction instrument WOMBAT, therefore the temperature profile is set linear to accurately extract phase volume fractions and thermal lattice strains in the specific regions. According to the results, the as-fabricated functionally graded material contains both fcc-Fe₃Ni and bcc-α-Fe, while after heat treatment the bcc-α-Fe is dissolved into the Fe₃Ni matrix and leads to lower hardness in the alloy. Also, the detected phase evolutions are mainly performed by the low Ni content section of the Fe–Fe₃Ni functionally graded material. In addition, compared to the bcc lattice in the as-fabricated functionally graded material, the dissolved Fe more considerably restraint the Fe₃Ni lattice deformation thus a much lower thermal expansion coefficient is measured from cooling than the heating process.

Original language	English
Article number	154097
Journal	Journal of Alloys and Compounds
Volume	826
DOIs	https://doi.org/10.1016/j.jallcom.2020.154097
State	Published - 15 Jun 2020

Keywords

Additive manufacturing
Functionally graded material
In-situ
Intermetallic
Neutron diffraction
Phase evolution

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10.1016/j.jallcom.2020.154097

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title = "Thermal induced phase evolution of Fe–Fe3Ni functionally graded material fabricated using the wire-arc additive manufacturing process: An in-situ neutron diffraction study",

abstract = "In the present research an Fe–Fe3Ni functionally graded material has been fabricated using an innovative wire-arc additive manufacturing process. Considering the residual bcc-α-Fe in the bulk material, a homogenization heat treatment is conducted to the as-fabricated alloy to transform the residual bcc lattice into fcc structure. During the entire heat treatment, the phase evolution process in Fe–Fe3Ni functionally graded material is in-situ characterized using the high-intensity neutron diffraction instrument WOMBAT, therefore the temperature profile is set linear to accurately extract phase volume fractions and thermal lattice strains in the specific regions. According to the results, the as-fabricated functionally graded material contains both fcc-Fe3Ni and bcc-α-Fe, while after heat treatment the bcc-α-Fe is dissolved into the Fe3Ni matrix and leads to lower hardness in the alloy. Also, the detected phase evolutions are mainly performed by the low Ni content section of the Fe–Fe3Ni functionally graded material. In addition, compared to the bcc lattice in the as-fabricated functionally graded material, the dissolved Fe more considerably restraint the Fe3Ni lattice deformation thus a much lower thermal expansion coefficient is measured from cooling than the heating process.",

keywords = "Additive manufacturing, Functionally graded material, In-situ, Intermetallic, Neutron diffraction, Phase evolution",

author = "Chen Shen and Xueming Hua and Mark Reid and Liss, {Klaus Dieter} and Gang Mou and Zengxi Pan and Ye Huang and Huijun Li",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = jun,

day = "15",

doi = "10.1016/j.jallcom.2020.154097",

language = "英语",

volume = "826",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Thermal induced phase evolution of Fe–Fe3Ni functionally graded material fabricated using the wire-arc additive manufacturing process

T2 - An in-situ neutron diffraction study

AU - Shen, Chen

AU - Hua, Xueming

AU - Reid, Mark

AU - Liss, Klaus Dieter

AU - Mou, Gang

AU - Pan, Zengxi

AU - Huang, Ye

AU - Li, Huijun

PY - 2020/6/15

Y1 - 2020/6/15

N2 - In the present research an Fe–Fe3Ni functionally graded material has been fabricated using an innovative wire-arc additive manufacturing process. Considering the residual bcc-α-Fe in the bulk material, a homogenization heat treatment is conducted to the as-fabricated alloy to transform the residual bcc lattice into fcc structure. During the entire heat treatment, the phase evolution process in Fe–Fe3Ni functionally graded material is in-situ characterized using the high-intensity neutron diffraction instrument WOMBAT, therefore the temperature profile is set linear to accurately extract phase volume fractions and thermal lattice strains in the specific regions. According to the results, the as-fabricated functionally graded material contains both fcc-Fe3Ni and bcc-α-Fe, while after heat treatment the bcc-α-Fe is dissolved into the Fe3Ni matrix and leads to lower hardness in the alloy. Also, the detected phase evolutions are mainly performed by the low Ni content section of the Fe–Fe3Ni functionally graded material. In addition, compared to the bcc lattice in the as-fabricated functionally graded material, the dissolved Fe more considerably restraint the Fe3Ni lattice deformation thus a much lower thermal expansion coefficient is measured from cooling than the heating process.

AB - In the present research an Fe–Fe3Ni functionally graded material has been fabricated using an innovative wire-arc additive manufacturing process. Considering the residual bcc-α-Fe in the bulk material, a homogenization heat treatment is conducted to the as-fabricated alloy to transform the residual bcc lattice into fcc structure. During the entire heat treatment, the phase evolution process in Fe–Fe3Ni functionally graded material is in-situ characterized using the high-intensity neutron diffraction instrument WOMBAT, therefore the temperature profile is set linear to accurately extract phase volume fractions and thermal lattice strains in the specific regions. According to the results, the as-fabricated functionally graded material contains both fcc-Fe3Ni and bcc-α-Fe, while after heat treatment the bcc-α-Fe is dissolved into the Fe3Ni matrix and leads to lower hardness in the alloy. Also, the detected phase evolutions are mainly performed by the low Ni content section of the Fe–Fe3Ni functionally graded material. In addition, compared to the bcc lattice in the as-fabricated functionally graded material, the dissolved Fe more considerably restraint the Fe3Ni lattice deformation thus a much lower thermal expansion coefficient is measured from cooling than the heating process.

KW - Additive manufacturing

KW - Functionally graded material

KW - In-situ

KW - Intermetallic

KW - Neutron diffraction

KW - Phase evolution

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DO - 10.1016/j.jallcom.2020.154097

M3 - 文章

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VL - 826

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

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ER -

Thermal induced phase evolution of Fe–Fe₃Ni functionally graded material fabricated using the wire-arc additive manufacturing process: An in-situ neutron diffraction study

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Keywords

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