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: Contribution to journal › Article › peer-review

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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⁻¹K⁻¹ to 0.45 J kg⁻¹K⁻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⁻¹at 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.

Original language	English
Article number	171063
Number of pages	10
Journal	Journal of Alloys and Compounds
Volume	961
Early online date	21 Jun 2023
DOIs	https://doi.org/10.1016/j.jallcom.2023.171063
Publication status	Published - 25 Oct 2023

Keywords

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

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10.1016/j.jallcom.2023.171063Licence: Creative Commons: Attribution (CC BY)

SunK2023effectFinal published version, 12.6 MBLicence: Creative Commons: Attribution (CC BY)

https://linkinghub.elsevier.com/retrieve/pii/S0925838823023666

Midlands Mag-Lab: A versatile magnetometry facility for advanced materials characterisation
Clark, L. & Chung, M.
Engineering & Physical Science Research Council
1/05/21 → 30/04/23
Project: Research Councils

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@article{7c55ac9621a047348803dffd768abe21,

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−1K−1 to 0.45 J kg−1K−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.",

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

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",

language = "English",

volume = "961",

journal = "Journal of Alloys and Compounds",

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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−1K−1 to 0.45 J kg−1K−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.

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−1K−1 to 0.45 J kg−1K−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.

KW - Laser powder bed fusion

KW - Heat treatment

KW - Microstructure

KW - Magnetic entropy change

KW - And Magnetocaloric material

U2 - 10.1016/j.jallcom.2023.171063

DO - 10.1016/j.jallcom.2023.171063

M3 - Article

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

Keywords

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Midlands Mag-Lab: A versatile magnetometry facility for advanced materials characterisation

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