Effect of Forming Environments on Microstructure of GH4169 Superalloy Fabricated Using High-Deposition-Rate Laser Metal Deposition

Zhao Xuan; Sui Shang; Li Zuo; Sun Chu; Chen Jing

doi:10.3788/CJL202047.0802004

Chinese Journal of Lasers, Volume. 47, Issue 8, 802004(2020)

Effect of Forming Environments on Microstructure of GH4169 Superalloy Fabricated Using High-Deposition-Rate Laser Metal Deposition

Zhao Xuan, Sui Shang, Li Zuo, Sun Chu, and Chen Jing

Author Affiliations

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an, Shaanxi 710072, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(14)

Fig. 1. Schematic of infrared camera placement

Download full size

Fig. 2. Infrared imaging of molten pool in different environments. (a) Air; (b) argon

Download full size

Fig. 3. Morphologies of single cladding layer deposited in two environments. (a) Air; (b) argon

Download full size

Fig. 4. Area of cladding layers deposited in two environments

Download full size

Fig. 5. Optical microscopy images of single cladding layer deposited in different environments. (a) Air; (b) argon

Download full size

Fig. 6. Schematic of heat flow and crystal growth in the molten pool^[12]

Download full size

Fig. 7. Measured primary dendrite spacing of sample deposited in different environments. (a) Air; (b) argon

Download full size

Fig. 8. EDS test locations in cladding layer deposited in different environments. (a) Air; (b) argon

Download full size

Fig. 9. Binarization of SEM images of cladding layer deposited in different environments: (a)(c) Air; (b)(d) argon

Download full size

Table 1. Chemical composition of GH4169 alloy powder
View table
Table 1. Chemical composition of GH4169 alloy powder
Element Cr Ni Nb Mo Al Ti Fe
Mass fraction /% 17.41 52.63 5.00 2.84 0.77 1.05 Bal.

Table 2. Process parameters for high deposition rate laser cladding of GH4169 alloy
View table
Table 2. Process parameters for high deposition rate laser cladding of GH4169 alloy
Laserpower /kW Scanningspeed /(mm·min^-1) Powderfeed rate /(kg·h^-1) Spotdiameter /mm
2.8 1200 2 4

Table 3. Main specifications of Image IR 8300 camera

View table

Table 3. Main specifications of Image IR 8300 camera

Technical item	Detail
Spectral range /μm	2.0 to 5.7
Detector pixel	640×512
Aperture ratio	f/3.0 or f/2.0
Measuring temperature range /℃	-40 to 3000
Measurement accuracy	±1 ℃ or ±1%
Image acquisition	Snapshot
Interface	GigE, CAMLink, USB

Table 4. Solidification conditions of molten pool in two environments
View table
Table 4. Solidification conditions of molten pool in two environments
Formingenvironment Cooling rate $\begin{matrix} \overset{\cdot}{T} \end{matrix}$ /(℃·s^-1) Temperaturegradient G /(℃·m^-1) Solidificationrate v /(m·s^-1)
Air 2640 80×10³ 0.0330
Argon 2070 55×10³ 0.0376

Table 5. Oxygen content of cladding layer deposited in two environments
View table
Table 5. Oxygen content of cladding layer deposited in two environments
Formingenvironment Mass fraction of oxygen /%
Sample 1 Sample 2 Mean
Air 1.154 1.128 1.141
Argon 0.876 1.038 0.957

Tools

Get Citation

Copy Citation Text

Zhao Xuan, Sui Shang, Li Zuo, Sun Chu, Chen Jing. Effect of Forming Environments on Microstructure of GH4169 Superalloy Fabricated Using High-Deposition-Rate Laser Metal Deposition[J]. Chinese Journal of Lasers, 2020, 47(8): 802004

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites