Effect of Powder Recycling on Microstructure and Tensile Behavior of GH4169 Alloy Fabricated by Selective Laser Melting (Invited)

Wei Song; Yuping Zhu; Jingjing Liang; Yizhou Zhou; Xiaofeng Sun; Jinguo Li

doi:10.3788/CJL240452

Chinese Journal of Lasers, Volume. 51, Issue 10, 1002310(2024)

Effect of Powder Recycling on Microstructure and Tensile Behavior of GH4169 Alloy Fabricated by Selective Laser Melting (Invited)

Wei Song^1,2, Yuping Zhu¹, Jingjing Liang¹, Yizhou Zhou¹, Xiaofeng Sun¹, and Jinguo Li^1、*

Author Affiliations

¹Shi -Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang110016, Liaoning , China

²School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, Liaoning , China

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Figures & Tables(19)

Fig. 1. Schematic of experimental procedure

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Fig. 2. Microstructures of powder under different recycling times. (a) 0; (b) 6; (c) 10; (d) 13

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Fig. 3. Longitudinal section microstructures of powder under different recycling times. (a)(b)(c) 0; (d)(e)(f) 6; (g)(h)(i) 10; (j)(k)(l) 13

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Fig. 4. Particle size distribution and distribution state of powder under different recycling times. (a) Particle size distribution of powder; (b) distribution state of powder

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Fig. 5. Microstructures of samples prepared under different powder recycling times after heat treatment. (a)(b)(c) 0th sample;

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Fig. 6. EBSD analysis results of samples prepared under different powder recycling times after heat treatment. (a) 0th sample; (b) 6th sample; (c) 10th sample; (d) 13th sample

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Fig. 7. Tensile curves of samples prepared under different powder recycling times after heat treatment. (a) Room temperature;(b) 650 ℃

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$RT tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c) 0th sample; (d)(e)(f) 6th sample; (g)(h)(i) 10th sample; (j)(k)(l) 13th sample$

Fig. 8. RT tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c) 0th sample; (d)(e)(f) 6th sample; (g)(h)(i) 10th sample; (j)(k)(l) 13th sample

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$Longitudinal section microstructures of RT tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c)(d) 0th sample; (e)(f)(g)(h) 6th sample; (i)(j)(k)(l) 10th sample; (m)(n)(o)(p) 13th sample$

Fig. 9. Longitudinal section microstructures of RT tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c)(d) 0th sample; (e)(f)(g)(h) 6th sample; (i)(j)(k)(l) 10th sample; (m)(n)(o)(p) 13th sample

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$650 ℃ tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment.$

Fig. 10. 650 ℃ tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment.

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$Longitudinal section microstructures of 650 ℃ tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c)(d) 0th sample; (e)(f)(g)(h) 6th sample; (i)(j)(k)(l) 10th sample; (m)(n)(o)(p) 13th sample$

Fig. 11. Longitudinal section microstructures of 650 ℃ tensile fracture morphologies of samples prepared under different powder recycling times after heat treatment. (a)(b)(c)(d) 0th sample; (e)(f)(g)(h) 6th sample; (i)(j)(k)(l) 10th sample; (m)(n)(o)(p) 13th sample

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$TEM images near RT tensile fracture of samples prepared under different powder recycling times after heat treatment.$

Fig. 12. TEM images near RT tensile fracture of samples prepared under different powder recycling times after heat treatment.

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$TEM images near 650 ℃ tensile fracture of samples prepared under different powder recycling times after heat treatment.$

Fig. 13. TEM images near 650 ℃ tensile fracture of samples prepared under different powder recycling times after heat treatment.

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Fig. 14. Tensile deformation mechanisms at RT and 650 °C. (a) RT; (b) 650 ℃

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Table 1. Measured compositions of GH4169 alloy powders under different recycling times (mass fraction, %)

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Table 1. Measured compositions of GH4169 alloy powders under different recycling times (mass fraction, %)

Recycling time	Ni	Cr	Mo	Al	Ti	Nb	C	O	N	Fe
0	51.55	18.30	3.21	0.60	0.91	5.42	0.04	0.020	0.0089	Bal.
6	51.54	18.33	3.24	0.60	0.92	5.42	0.04	0.022	0.0090	Bal.
10	51.56	18.30	3.26	0.63	0.91	5.41	0.04	0.023	0.0095	Bal.
13	51.54	18.35	3.25	0.65	0.89	5.43	0.04	0.026	0.0095	Bal.

Table 2. Heat treatment regimes for fabricating GH4169 samples

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Table 2. Heat treatment regimes for fabricating GH4169 samples

Heat treatment regime

Vacuum homogenization

Vacuum solution

Vacuum aging

Content

1080 ℃， 1.5 h/Ar cooling，

heating rate of 10 ℃/ min

980 ℃， 1 h/Ar cooling

720 ℃， 8 h/Ar cooling，

620 ℃， 8 h/Ar cooling

Table 3. Particle size distributions of powder under different recycling times

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Table 3. Particle size distributions of powder under different recycling times

Recycling time	D10 /μm	D50 /μm	D90 /μm	Peak particle size /μm	Extreme particle size /μm	Average particle size /μm
0	11.00	28.62	52.64	37.77	75.00	30.45
6	14.14	32.60	55.43	39.22	77.00	33.84
10	16.40	35.64	57.39	41.80	81.00	41.80
13	15.72	38.09	61.59	47.21	85.00	38.45

Table 4. Tensile properties of samples prepared under different powder recycling times after heat treatment

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Table 4. Tensile properties of samples prepared under different powder recycling times after heat treatment

Alloy	UTS /MPa （room temperature）	YS/MPa （room temperature）	Strain /% （room temperature）	UTS /MPa（650 ℃）	YS /MPa（650 ℃）	Strain /%（650 ℃）
0th	1418.00	1332.70	20.50	1185.00	1103.00	22.50
6th	1430.00	1318.70	22.00	1205.00	1130.00	24.00
10th	1410.00	1298.50	23.10	1180.00	1098.00	22.00
13th	1395.00	1293.00	19.50	1165.00	1078.00	20.90

Table 5. Performance comparison of GH4169 alloys with different states after heat treatment

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Table 5. Performance comparison of GH4169 alloys with different states after heat treatment

Alloy	UTS /MPa （room temperature）	YS/MPa （room temperature）	Strain /% （room temperature）	UTS /MPa（650 ℃）	YS /MPa（650 ℃）	Strain /%（650 ℃）
Casting	1082.00	912.00	27.80	‒	‒	‒
Forge	1280.00	1030.00	15.00	1000.00	860.00	15.00
AM	1390.80	‒	12.40	1126.00	965.00	21.00
This research	1415.00	1236.00	33.00	1181.00	1029.00	26.00

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Wei Song, Yuping Zhu, Jingjing Liang, Yizhou Zhou, Xiaofeng Sun, Jinguo Li. Effect of Powder Recycling on Microstructure and Tensile Behavior of GH4169 Alloy Fabricated by Selective Laser Melting (Invited)[J]. Chinese Journal of Lasers, 2024, 51(10): 1002310

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Paper Information

Category: Laser Additive Manufacturing

Received: Jan. 3, 2024

Accepted: Apr. 2, 2024

Published Online: Apr. 27, 2024

The Author Email: Li Jinguo (jgli@imr.ac.cn)

DOI:10.3788/CJL240452

CSTR:32183.14.CJL240452

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology