The effect of thermal post-processing treatment on laser powder bed fusion processed NiMnSn-based alloy for magnetic refrigeration

Kun Sun; Sheng Li; Abd El-Moez A. Mohamed; Kan Ma; Ranxi Duan; Oliver Peter Brooks; Minki Jeong; Jake Head; Richard S. Sheridan; Moataz M. Attallah

doi:10.1016/j.jallcom.2023.171063

The effect of thermal post-processing treatment on laser powder bed fusion processed NiMnSn-based alloy for magnetic refrigeration

Kun Sun
, Sheng Li
, Abd El-Moez A. Mohamed
, Kan Ma
, Ranxi Duan
, Oliver Peter Brooks
, Minki Jeong
, Jake Head
, Richard S. Sheridan
, Moataz M. Attallah^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

3 Citations (Scopus)

12 Downloads (CityUHK Scholars)

Abstract

This study investigates the effects of heat treatment (HT) time (one, two, and three weeks) on the microstructure and magnetocaloric effect (MCE) of laser powder bed fusion (LPBF) NiMnSn alloys. Increasing the HT time improves chemical homogeneity, and decreases the local misorientation imparted by the LPBF process. This is also associated with an enhancement in the maximum magnetic entropy change (ΔS_m) values around the martensitic transformation temperature (T_M), which increases from 0.2 J kg⁻¹ K⁻¹ to 0.45 J kg⁻¹ K⁻¹ under 1 T applied magnetic field. However, the ΔS_m of the one-week HTed sample around the curie temperature (T_c) (0.90 J kg⁻¹K⁻¹ at 315 K) is slightly lower than the two weeks and three weeks HTed samples (0.99 J kg⁻¹K⁻¹ at 320 K, 0.94 J kg⁻¹K⁻¹ at 320 K), respectively. © 2023 The Author(s)

Original language	English
Article number	171063
Journal	Journal of Alloys and Compounds
Volume	961
Online published	21 Jun 2023
DOIs	https://doi.org/10.1016/j.jallcom.2023.171063
Publication status	Published - 25 Oct 2023
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

And Magnetocaloric material
Heat treatment
Laser powder bed fusion
Magnetic entropy change
Microstructure

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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10.1016/j.jallcom.2023.171063

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title = "The effect of thermal post-processing treatment on laser powder bed fusion processed NiMnSn-based alloy for magnetic refrigeration",

abstract = "This study investigates the effects of heat treatment (HT) time (one, two, and three weeks) on the microstructure and magnetocaloric effect (MCE) of laser powder bed fusion (LPBF) NiMnSn alloys. Increasing the HT time improves chemical homogeneity, and decreases the local misorientation imparted by the LPBF process. This is also associated with an enhancement in the maximum magnetic entropy change (ΔSm) values around the martensitic transformation temperature (TM), which increases from 0.2 J kg−1 K−1 to 0.45 J kg−1 K−1 under 1 T applied magnetic field. However, the ΔSm of the one-week HTed sample around the curie temperature (Tc) (0.90 J kg−1K−1 at 315 K) is slightly lower than the two weeks and three weeks HTed samples (0.99 J kg−1K−1 at 320 K, 0.94 J kg−1K−1 at 320 K), respectively. {\textcopyright} 2023 The Author(s)",

keywords = "And Magnetocaloric material, Heat treatment, Laser powder bed fusion, Magnetic entropy change, Microstructure",

author = "Kun Sun and Sheng Li and Mohamed, \{Abd El-Moez A.\} and Kan Ma and Ranxi Duan and Brooks, \{Oliver Peter\} and Minki Jeong and Jake Head and Sheridan, \{Richard S.\} and Attallah, \{Moataz M.\}",

year = "2023",

month = oct,

day = "25",

doi = "10.1016/j.jallcom.2023.171063",

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T1 - The effect of thermal post-processing treatment on laser powder bed fusion processed NiMnSn-based alloy for magnetic refrigeration

AU - Sun, Kun

AU - Li, Sheng

AU - Mohamed, Abd El-Moez A.

AU - Ma, Kan

AU - Duan, Ranxi

AU - Brooks, Oliver Peter

AU - Jeong, Minki

AU - Head, Jake

AU - Sheridan, Richard S.

AU - Attallah, Moataz M.

PY - 2023/10/25

Y1 - 2023/10/25

N2 - This study investigates the effects of heat treatment (HT) time (one, two, and three weeks) on the microstructure and magnetocaloric effect (MCE) of laser powder bed fusion (LPBF) NiMnSn alloys. Increasing the HT time improves chemical homogeneity, and decreases the local misorientation imparted by the LPBF process. This is also associated with an enhancement in the maximum magnetic entropy change (ΔSm) values around the martensitic transformation temperature (TM), which increases from 0.2 J kg−1 K−1 to 0.45 J kg−1 K−1 under 1 T applied magnetic field. However, the ΔSm of the one-week HTed sample around the curie temperature (Tc) (0.90 J kg−1K−1 at 315 K) is slightly lower than the two weeks and three weeks HTed samples (0.99 J kg−1K−1 at 320 K, 0.94 J kg−1K−1 at 320 K), respectively. © 2023 The Author(s)

AB - This study investigates the effects of heat treatment (HT) time (one, two, and three weeks) on the microstructure and magnetocaloric effect (MCE) of laser powder bed fusion (LPBF) NiMnSn alloys. Increasing the HT time improves chemical homogeneity, and decreases the local misorientation imparted by the LPBF process. This is also associated with an enhancement in the maximum magnetic entropy change (ΔSm) values around the martensitic transformation temperature (TM), which increases from 0.2 J kg−1 K−1 to 0.45 J kg−1 K−1 under 1 T applied magnetic field. However, the ΔSm of the one-week HTed sample around the curie temperature (Tc) (0.90 J kg−1K−1 at 315 K) is slightly lower than the two weeks and three weeks HTed samples (0.99 J kg−1K−1 at 320 K, 0.94 J kg−1K−1 at 320 K), respectively. © 2023 The Author(s)

KW - And Magnetocaloric material

KW - Heat treatment

KW - Laser powder bed fusion

KW - Magnetic entropy change

KW - Microstructure

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85163027618&origin=recordpage

U2 - 10.1016/j.jallcom.2023.171063

DO - 10.1016/j.jallcom.2023.171063

M3 - RGC 21 - Publication in refereed journal

SN - 0925-8388

VL - 961

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 171063

ER -

The effect of thermal post-processing treatment on laser powder bed fusion processed NiMnSn-based alloy for magnetic refrigeration

Abstract

UN SDGs

Research Keywords

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