Eutectic Behavior and Wear and Corrosion Resistance Mechanisms of FeCoNiCrNb<sub>0.5</sub>Mo<sub>0.25 </sub>High-Entropy Alloy Laser Cladding Layer Microstructure

Zijun Zhou; Fulin Jiang; Fazhan Yang; Yuling Wang; Yong Yang; Pengfang Song; Zhaolin Zhong

doi:10.3788/CJL220498

Chinese Journal of Lasers, Volume. 50, Issue 4, 0402011(2023)

Eutectic Behavior and Wear and Corrosion Resistance Mechanisms of FeCoNiCrNb_0.5Mo_0.25High-Entropy Alloy Laser Cladding Layer Microstructure

Zijun Zhou, Fulin Jiang^*, Fazhan Yang, Yuling Wang, Yong Yang, Pengfang Song, and Zhaolin Zhong

Author Affiliations

Key Laboratory of Laser Green Intelligent Manufacturing Technology, School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China

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Figures & Tables(24)

Fig. 1. Failure mode of ship stern shaft^[20-21]

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Fig. 2. XRD results of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

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Fig. 3. SEM images of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

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Fig. 4. Microstructures of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

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Fig. 5. Microhardness test results. (a) Microhardness test position; (b) microhardness curve; (c) average microhardness of cladding layer

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Fig. 6. Element distributions of top of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers. (a) EDS line scanning direction; (b) 1200 W; (c) 1300 W; (d) 1400 W; (e) 1500 W; (f) 1600 W

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Fig. 7. Friction coefficient of substrate sample and FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer samples prepared at different laser powers. (a) Friction coefficient curve; (b) average friction coefficient

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Fig. 8. Low magnification and high magnification images of wear morphology of substrate sample and FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer samples prepared at different laser powers. (a1)(a2) 1200 W; (b1)(b2) 1300 W; (c1)(c2) 1400 W; (d1)(d2) 1500 W; (e1)(e2) 1600 W; (f1)(f2) substrate

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Fig. 9. Element distribution of on wear surface

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Fig. 10. Three dimensional image and contour curve of wear surface of substrate sample and FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer samples prepared at different laser powers. (a) 1200 W; (b) 1300 W; (c) 1400 W; (d) 1500 W; (e) 1600 W; (f) substrate

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Fig. 11. Wear rate of high-entropy alloy cladding layer and substrate

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Fig. 12. Relationship between wear rate of high-entropy alloy cladding layer and H/E^*

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Fig. 13. Polarization curves of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer and substrate samples in 3.5% NaCl solution

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Fig. 14. Surface corrosion morphologies of substrate sample and FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer samples prepared at different laser powers. (a) 1200 W; (b) 1300 W; (c) 1400 W; (d) 1500 W; (e) 1600 W; (f) substrate

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Fig. 15. Local enlarged feature of corrosion surface of high-entropy alloy cladding layer

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Fig. 16. Relationship between FCC phase content and self corrosion current density

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Table 1. Chemical composition of 42CrMo steel^[34]
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Table 1. Chemical composition of 42CrMo steel^[34]
Element Mass fraction /%
C 0.42
Cr 1.12
Mn 0.65
Si 0.28
Mo 0.22
Fe Bal.

Table 2. Element binary mixing enthalpy^［35］
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Table 2. Element binary mixing enthalpy^［35］
Element Fe Co Ni Cr Nb Mo
Fe -1 -2 -1 -16 -2
Co -1 0 -4 -25 -5
Ni -2 0 -7 -30 -7
Cr -1 -4 -7 -7 0
Nb -16 -25 -30 -7 -6
Mo -2 -5 -7 0 -6

Table 3. Element content in different regions of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

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Table 3. Element content in different regions of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

Power /W	Region inFig.3	Atomic fraction /%
Power /W	Region inFig.3	Fe	Co	Ni	Cr	Nb	Mo
1200	A	37.21	16.65	16.40	17.02	8.89	3.83
	B	32.41	18.93	18.83	16.13	9.52	4.17
	C	38.89	16.24	16.20	15.04	10.34	3.28
1300	A	31.96	19.85	19.90	16.41	8.57	3.34
	B	32.48	19.13	19.96	16.25	8.70	3.50
	C	36.52	16.90	17.81	14.73	10.19	3.86
1400	A	32.23	18.27	20.12	16.92	8.95	3.51
	B	31.13	18.03	20.08	16.68	10.43	3.66
	C	36.43	16.93	18.15	14.08	10.84	3.56
1500	A	37.95	18.33	18.31	14.54	7.64	3.25
	B	37.10	16.76	19.92	15.14	7.77	3.22
	C	44.36	15.51	14.00	13.32	9.42	3.39
1600	A	45.17	15.47	15.77	12.80	7.69	3.11
	B	42.11	16.20	15.71	13.07	9.42	3.49
	C	46.53	14.21	12.97	12.74	10.11	3.44

Table 4. Each element content in FeCoNiCrNb_0.5Mo_0.25 cladding layer prepared at different laser powers

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Table 4. Each element content in FeCoNiCrNb_0.5Mo_0.25 cladding layer prepared at different laser powers

Power /W	Atomic fraction /%
Power /W	Fe	Co	Ni	Cr	Nb	Mo
Nominal composition	21.05	21.05	21.05	21.05	10.52	5.26
1200	33.61	16.70	20.23	16.19	9.63	3.64
1300	33.89	17.68	18.28	16.80	9.49	3.86
1400	33.90	18.65	17.05	16.03	10.58	3.79
1500	39.30	17.73	16.22	15.01	8.16	3.58
1600	42.70	14.96	15.46	13.57	9.52	3.79

Table 5. Element content of phases of A and B in FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

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Table 5. Element content of phases of A and B in FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

Power /W	Phase	Atomic fraction /%
Power /W	Phase	Fe	Co	Ni	Cr	Nb	Mo
1200	A	31.89	20.32	23.57	19.27	2.65	2.44
1200	B	28.09	19.90	21.55	17.94	8.23	4.30
1300	A	36.14	18.35	21.57	18.27	3.53	2.14
1300	B	27.32	19.48	15.62	13.18	17.04	7.37
1400	A	39.27	17.13	20.08	16.59	4.74	2.17
1400	B	29.87	17.91	14.23	11.89	19.21	6.90
1500	A	45.56	16.10	17.59	15.03	3.37	2.36
1500	B	33.79	16.68	13.51	11.32	17.91	6.78
1600	A	47.50	16.40	16.50	15.28	1.91	2.40
1600	B	32.90	16.49	12.08	11.32	19.53	7.69

Table 6. Microhardness H and effective elastic modulus E^* of high-entropy alloy cladding layer obtained by nanoindentation test
View table
Table 6. Microhardness H and effective elastic modulus E^* of high-entropy alloy cladding layer obtained by nanoindentation test
Power /W H /GPa E^*/GPa H /E^*
1200 8.4534 218.3194 0.0387
1300 8.6006 217.5833 0.0395
1400 8.6966 219.5826 0.0396
1500 7.2948 214.2200 0.0341
1600 7.5393 223.9427 0.0337

Table 7. Electrochemical parameters of FeCoNiCrNb_0.5Mo_0.25high-entropy alloy cladding layer and substrate samples in 3.5% NaCl solution
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Table 7. Electrochemical parameters of FeCoNiCrNb_0.5Mo_0.25high-entropy alloy cladding layer and substrate samples in 3.5% NaCl solution
Sample E_corr /V i_corr /（A·cm^-2）
1200 W -0.931 3.506×10^-6
1300 W -0.618 1.716×10^-6
1400 W -0.806 4.332×10^-6
1500 W -0.682 2.643×10^-6
1600 W -0.643 1.930×10^-6
Substrate -0.885 9.321×10^-6

Table 8. Element content in different corrosion areas

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Table 8. Element content in different corrosion areas

Power /W	Region in Fig.14	Atomic fraction /%
Power /W	Region in Fig.14	Fe	Co	Ni	Cr	Nb	Mo	O
1200	A	1.28	0.89	0.88	15.03	13.46	0.67	67.79
	B	16.67	14.47	9.90	12.50	15.83	6.22	14.40
	C	27.29	16.45	20.76	17.47	8.12	3.73	6.18
1300	A	0.61	0.30	0.01	18.46	10.10	0.28	70.22
	B	20.75	13.26	12.91	13.73	13.80	5.73	19.82
	C	29.27	16.97	17.43	14.61	10.09	4.35	7.28
1400	A	1.67	0.27	0.40	6.42	7.72	0.25	83.81
	B	18.75	11.18	7.89	9.05	15.45	7.04	30.63
	C	34.42	17.84	19.80	16.43	4.62	2.81	4.09
1500	A	0.52	0.36	0.00	11.26	11.65	0.00	76.21
	B	26.29	13.41	9.77	11.76	16.08	6.96	15.72
	C	34.79	15.47	17.61	14.05	9.73	4.71	3.64
1600	A	3.09	0.70	0.86	12.83	7.01	0.27	75.25
1600	C	37.22	15.41	14.74	14.16	9.16	4.26	5.06

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Zijun Zhou, Fulin Jiang, Fazhan Yang, Yuling Wang, Yong Yang, Pengfang Song, Zhaolin Zhong. Eutectic Behavior and Wear and Corrosion Resistance Mechanisms of FeCoNiCrNb_0.5Mo_0.25High-Entropy Alloy Laser Cladding Layer Microstructure[J]. Chinese Journal of Lasers, 2023, 50(4): 0402011

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Paper Information

Category: laser manufacturing

Received: Jan. 17, 2022

Accepted: Apr. 2, 2022

Published Online: Feb. 10, 2023

The Author Email: Jiang Fulin (jiangfl@qut.edu.cn)

DOI:10.3788/CJL220498

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Chemical composition of 42CrMo steel[34]

Table 1. Chemical composition of 42CrMo steel[34]

Table 2. Element binary mixing enthalpy［35］

Table 2. Element binary mixing enthalpy［35］

Table 3. Element content in different regions of FeCoNiCrNb0.5Mo0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 3. Element content in different regions of FeCoNiCrNb0.5Mo0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 4. Each element content in FeCoNiCrNb0.5Mo0.25 cladding layer prepared at different laser powers

Table 4. Each element content in FeCoNiCrNb0.5Mo0.25 cladding layer prepared at different laser powers

Table 5. Element content of phases of A and B in FeCoNiCrNb0.5Mo0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 5. Element content of phases of A and B in FeCoNiCrNb0.5Mo0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 6. Microhardness H and effective elastic modulus E* of high-entropy alloy cladding layer obtained by nanoindentation test

Table 6. Microhardness H and effective elastic modulus E* of high-entropy alloy cladding layer obtained by nanoindentation test

Table 7. Electrochemical parameters of FeCoNiCrNb0.5Mo0.25high-entropy alloy cladding layer and substrate samples in 3.5% NaCl solution

Table 7. Electrochemical parameters of FeCoNiCrNb0.5Mo0.25high-entropy alloy cladding layer and substrate samples in 3.5% NaCl solution

Table 8. Element content in different corrosion areas

Table 8. Element content in different corrosion areas

Table 1. Chemical composition of 42CrMo steel^[34]

Table 1. Chemical composition of 42CrMo steel^[34]

Table 2. Element binary mixing enthalpy^［35］

Table 2. Element binary mixing enthalpy^［35］

Table 3. Element content in different regions of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 3. Element content in different regions of FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 4. Each element content in FeCoNiCrNb_0.5Mo_0.25 cladding layer prepared at different laser powers

Table 4. Each element content in FeCoNiCrNb_0.5Mo_0.25 cladding layer prepared at different laser powers

Table 5. Element content of phases of A and B in FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 5. Element content of phases of A and B in FeCoNiCrNb_0.5Mo_0.25 high-entropy alloy cladding layer prepared at different laser powers

Table 6. Microhardness H and effective elastic modulus E^* of high-entropy alloy cladding layer obtained by nanoindentation test

Table 6. Microhardness H and effective elastic modulus E^* of high-entropy alloy cladding layer obtained by nanoindentation test

Table 7. Electrochemical parameters of FeCoNiCrNb_0.5Mo_0.25high-entropy alloy cladding layer and substrate samples in 3.5% NaCl solution

Table 7. Electrochemical parameters of FeCoNiCrNb_0.5Mo_0.25high-entropy alloy cladding layer and substrate samples in 3.5% NaCl solution