HU Xuzhao; CHEN Xiangling; XU Zhenlin; ZHANG Dianbao; LIU Jing; XIA Ailin

doi:10.7498/aps.74.20250286

Abstract

Magnetic high-entropy alloy (HEA) has certain application prospects in the fields of energy conversion, hysteresis motor, electromagnetic control mechanism and others. In this study, AlCoCrCuFeNi HEA is prepared by selective laser melting (SLM) with different process parameters, and the phase composition, microstructure, magnetic properties and micromechanical behavior are studied systematically. The results show that the SLMed alloy mainly consists of a BCC matrix phase with a small quantity of approximately spherical FCC precipitated nanophase. The nanohardness decreases with the increase of laser power and fluctuates in a certain range with the change of scanning speed, but the whole sample shows excellent micromechanical properties. Besides, it is found that the room-temperature nanoindentation creep deformation mechanism of AlCoCrCuFeNi HEAs is mainly controlled by dislocation motion, which is different from the results given by the traditional classical creep theory. Both of SLMed alloys exhibit typical semi-hard magnetic properties. The saturation magnetization is affected slightly by the SLM process parameters and remains at about 43 A·m²/kg because all samples have a similar quantity of ferromagnetic elements (Fe, Co and Ni). However, the coercivity increases from 1.72 to 2.71 kA/m with the increase of laser power (P), and decreases from 2.37 to 1.98 kA/m with the increase of scanning speed (v), which can be attributed to the different effects of porosity and internal stress on the pinning of domain walls under different process parameters (P and v). This work provides a theoretical basis and experimental direction for further studying the optimization of comprehensive magnetic properties and the room temperature creep mechanism of SLMed high-entropy alloy.

Keywords:

Authors and contacts

Corresponding author: XIA Ailin, alxia@126.com

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 52272263).

FullText HTML

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]

Cited By

DownLoad: Full-Size Img PowerPoint

Elements	Al	Co	Cr	Cu	Fe	Ni
Mass fraction/%	8.85	18.86	16.59	20.28	17.25	18.11
Density/(g·mm^–3)	2.7	8.85	7.75	8.90	7.87	8.85
Melting point/K	933	1770	2123	1356	1811	1728
Average atomic/nm	0.1432	0.1363	0.1249	0.1280	0.1270	0.1240
Structure	FCC	HCP	BCC	FCC	BCC	FCC
VEC*	3	9	6	11	8	10
*VEC—valence electron concentration.

DownLoad: CSV

工艺参数	取值
Laser thickness (t)/μm	40
Laser power (P)/W	110—150
Scan velocity (v)/(mm·s^–1)	1350—1550
Hatch spacing (h)/μm	50

DownLoad: CSV

P/W	V_BCC/%	V_FCC/%	a_BCC/Å	a_FCC/Å
110	94.89	5.11	2.8709±0.0006	3.6100±0.0006
120	94.38	5.62	2.8726±0.0017	3.6280±0.0007
130	94.24	5.76	2.8752±0.0012	3.6289±0.0017
140	93.41	6.59	2.8762±0.0011	3.6310±0.0023
150	92.04	7.96	2.8763±0.0006	3.6367±0.0014

DownLoad: CSV

v/(mm·s^–1)	V_BCC/%	V_FCC/%	a_BCC/Å	a_FCC/Å
1350	94.84	5.16	2.8840±0.0029	3.6460±0.0012
1400	94.89	5.11	2.8825±0.0012	3.6289±0.0017
1450	93.75	6.25	2.8810±0.0034	3.6430±0.0006
1500	94.13	5.87	2.8773±0.0015	3.6358±0.0021
1550	93.62	6.38	2.8737±0.0009	3.6297±0.0024

DownLoad: CSV

P/W	H_max/nm	Nano-hardness/GPa	E/GPa
110	321.5±13.8	8.8±0.9	202.3±8.4
120	322.4±2.1	8.7±0.2	202.5±6.7
130	323.2±13.6	8.7±0.8	208.9±15.6
140	326.8±6.2	8.5±0.5	201.8±2.3
150	332.3±8.4	8.2±0.5	203.8±5.0

DownLoad: CSV

v/(mm·s^–1)	H_max/nm	Nano-hardness/GPa	E/GPa
1350	331.0±6.3	8.2±0.4	199.2±10.9
1400	323.2±13.6	8.7±0.8	208.9±15.6
1450	322.3±3.8	8.8±0.2	201.7±8.6
1500	338.7±8.5	7.7±0.4	197.0±7.7
1550	332.3±8.4	8.1±0.5	193.3±5.0

DownLoad: CSV

map

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]
[39]
[40]
[41]
[42]

[1]	BO Le, GAO Xiaoyu, NING Zhiliang, WANG Li, SUN Jianfei, ZHANG Zhenjiang, HUANG Yongjiang. Optimizing microstructure and mechanical properties of CoCrFeNi high-entropy alloy microfibers by electric current treatment. Acta Physica Sinica, 2025, 74(13): 138102. doi: 10.7498/aps.74.20250518
[2]	JIANG Xiaoyue, HUANG Zhimin, WANG Xuan, ZHANG Xiang, YANG Weiming, LIU Haishun. Effects of substrate temperature on crystallization of Fe-based amorphous alloy prepared by selective laser melting. Acta Physica Sinica, 2025, 74(1): 017501. doi: 10.7498/aps.74.20240662
[3]	Wang Zhuang, Jin Fan, Li Wei, Ruan Jia-Yi, Wang Long-Fei, Wu Xue-Lian, Zhang Yi-Kun, Yuan Chen-Chen. Design and fabrication of GdHoErCoNiAl metallic glasses with excellent glass forming capability and magnetocaloric effects. Acta Physica Sinica, 2024, 73(21): 217101. doi: 10.7498/aps.73.20241132
[4]	Zhang Jian, Hao Qi, Zhang Lang-Ting, Qiao Ji-Chao. Probing microstructural heterogeneity of La-based amorphous alloy under versatile mechanical stimuli. Acta Physica Sinica, 2024, 73(4): 046101. doi: 10.7498/aps.73.20231421
[5]	Shi Fang-Jie, Li Nan, Guo Jun-Ming, Chen Bai-Yi, Li Sa-Teng, Liu Hao-Liang, Guo Jian-Ye, Li Qian-Wu, Li Ye-Fei, Xiao Bing. Monte-Carlo simulation of mass density field coupled dynamics for microstructural evolution of Fe-Cr binary alloys. Acta Physica Sinica, 2023, 72(13): 136401. doi: 10.7498/aps.72.20230291
[6]	Wen Peng, Tao Gang. Molecular dynamics study of temperature effects on shock response and plastic deformation mechanism of CoCrFeMnNi high-entropy alloys. Acta Physica Sinica, 2022, 71(24): 246101. doi: 10.7498/aps.71.20221621
[7]	An Min-Rong, Li Si-Lan, Su Meng-Jia, Deng Qiong, Song Hai-Yang. Molecular dynamics simulation of size dependent plastic deformation mechanism of CoCrFeNiMn crystalline/amorphous dual-phase high-entropy alloys. Acta Physica Sinica, 2022, 71(24): 243101. doi: 10.7498/aps.71.20221368
[8]	Chen Jing-Jing, Qiu Xiao-Lin, Li Ke, Zhou Dan, Yuan Jun-Jun. Mechanical performance analysis of nanocrystalline CoNiCrFeMn high entropy alloy: atomic simulation method. Acta Physica Sinica, 2022, 71(19): 199601. doi: 10.7498/aps.71.20220733
[9]	Shen Tian-Zhan, Song Hai-Yang, An Min-Rong. Effect of twin boundary on mechanical behavior of Cr₂₆Mn₂₀Fe₂₀Co₂₀Ni₁₄ high-entropy alloy by molecular dynamics simulation. Acta Physica Sinica, 2021, 70(18): 186201. doi: 10.7498/aps.70.20210324
[10]	Ren Xian-Li, Zhang Wei-Wei, Wu Xiao-Yong, Wu Lu, Wang Yue-Xia. Prediction of short range order in high-entropy alloys and its effect on the electronic, magnetic and mechanical properties. Acta Physica Sinica, 2020, 69(4): 046102. doi: 10.7498/aps.69.20191671
[11]	Yang Jun-Sheng, Zhu Zi-Liang, Cao Qi-Long. Effect of pre-orientation on formation of microstructure of lamella crystal and the stress response of semicrystalline polymers: Molecular dynamics simulations. Acta Physica Sinica, 2020, 69(3): 038101. doi: 10.7498/aps.69.20191191
[12]	Lu Zhi-Wen, Zhong Zhi-Guo, Liu Ke-Tao, Song Hai-Zhen, Li Gen-Quan. First-principles calculations of microstructure and thermodynamic properties of the intermetallic compound in Ag-Mg-Zn alloy under high pressure and high temperature. Acta Physica Sinica, 2013, 62(1): 016106. doi: 10.7498/aps.62.016106
[13]	Zhou Nai-Gen, Hu Qiu-Fa, Xu Wen-Xiang, Li Ke, Zhou Lang. A comparative study of different potentials for molecular dynamics simulations of melting process of silicon. Acta Physica Sinica, 2013, 62(14): 146401. doi: 10.7498/aps.62.146401
[14]	Tian Hui-Chen, Liu Li, Wen Yu-Hua. Shape changes and melting characteristics of cubic Pt nanoparticle：A molecular dynamics study. Acta Physica Sinica, 2009, 58(6): 4080-4084. doi: 10.7498/aps.58.4080
[15]	Li Teng, Li Wei, Pan Wei, Li Xiu-Mei. Effect of microstructure on the mechanical properties of Fe45—50 Cr30—35Co20—25Mo0—4Zr0—2 alloy. Acta Physica Sinica, 2005, 54(9): 4395-4399. doi: 10.7498/aps.54.4395
[16]	Yang Sen, Su YunPeng, Huang Wei Dong, Zhou YaoHe. Microstructure characteristics of Cu31.4%Mn alloyunder laser rapid solidification condition. Acta Physica Sinica, 2003, 52(1): 81-86. doi: 10.7498/aps.52.81
[17]	SHAO YUAN-ZHI, XIONG ZHENG-YE, ZHANG JIE-LI, ZHANG JIN-XIU. CHARACTERISTICS IN MAGNETOCALORIC EFFECT AND MAGNETIC ENTROPY OF NANOMETER BINARY GADOLINIUM ALLOYS. Acta Physica Sinica, 1996, 45(10): 1749-1755. doi: 10.7498/aps.45.1749
[18]	DENG WEN, XIONG LIANG-YUE, LONG QI-WEI, WANG SHU-HE, GUO JIAN-TING. A MICROMECHANISM FOR B IMPROVING THE MECHANICAL PROPERTIES OF MONO- AND POLYCRYSTALLINE Ni3Al ALLOYS. Acta Physica Sinica, 1994, 43(1): 154-160. doi: 10.7498/aps.43.154
[19]	CHEN KUI-YING, LI QING-CHUN. MICRODYNAMICAL BEHAVIORS OF SUPERCOOLED LIQUID Mg-Ca ALLOY. Acta Physica Sinica, 1993, 42(9): 1491-1498. doi: 10.7498/aps.42.1491
[20]	NIE XIANG-FU, TANG GUI-DE, NIU XIOU-DE, HAN BAO-SHAN. FORMATION AND STATIC CHARACTERISTICS OF THREE KINDS OF HARD DOMAINS IN BUBBLE MATERIALS. Acta Physica Sinica, 1990, 39(2): 296-301. doi: 10.7498/aps.39.296

Catalog

Vol. 74, Issue 12 - 2025-06-20

Metrics

Abstract views: 470
PDF Downloads: 15
Cited By: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: XIA Ailin, alxia@126.com

FullText HTML

References

Cited By

Catalog

Metrics

Authors

Referees

About Journal

About

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: XIA Ailin, alxia@126.com

FullText HTML

References

Cited By

Catalog

Metrics

Publishing process

Authors

Referees

About Journal

About