Effect of Laser Shock Peening on High-Temperature Tensile Property of GH3039 Superalloy

Jianyun Xiang; Maozhong Ge; Taiming Wang

doi:10.3788/LOP202259.0716002

Laser & Optoelectronics Progress, Volume. 59, Issue 7, 0716002(2022)

Effect of Laser Shock Peening on High-Temperature Tensile Property of GH3039 Superalloy

Jianyun Xiang¹, Maozhong Ge^2、*, and Taiming Wang³

¹School of Modern Equipment Manufacturing, Changzhou Institute of Industry Technology, Changzhou , Jiangsu 213164, China

²School of Material Engineering, Jiangsu University of Technology, Changzhou , Jiangsu 213001, China

³AECC Changzhou Lanxiang Machinery Co., Ltd., Changzhou , Jiangsu 213022, China

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Figures & Tables(11)

Fig. 1. High-temperature tension specimen. (a) Dimension; (b) real picture

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Fig. 2. Microstructures of GH3039 supe alloy before and after LSP at room temperature. (a) Base metal; (b) LSP sample

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Fig. 3. Microstructure of LSP GH3039 after exposure at 600 ℃ for 5 h

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Fig. 4. Residual stress distributions in surface layer of GH3039 superalloy before and after LSP

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Fig. 5. Tensile stress-strain curves of GH3039 base metal and LSP sample tested at 600 ℃

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$EDS analysis results of fracture of high-temperature tensile specimen. (a) Base metal; (b) LSP sample; (c) analysis result of point C in Fig. 6 (a); (d) analysis result of point D in Fig. 6 (a); (e) analysis result of point E in Fig. 6 (b); (f) analysis result of point F in Fig. 6 (b)$

Fig. 6. EDS analysis results of fracture of high-temperature tensile specimen. (a) Base metal; (b) LSP sample; (c) analysis result of point C in Fig. 6 (a); (d) analysis result of point D in Fig. 6 (a); (e) analysis result of point E in Fig. 6 (b); (f) analysis result of point F in Fig. 6 (b)

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$Microstructures of high-temperature tensile fracture of GH3039. (a) Base metal; (b) LSP sample$

Fig. 7. Microstructures of high-temperature tensile fracture of GH3039. (a) Base metal; (b) LSP sample

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Table 1. Chemical compositions of GH3039 (mass fraction, %)
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Table 1. Chemical compositions of GH3039 (mass fraction, %)
Composition C Cr Mo Al Ti Nb Mn Si Fe P S Ni
Value ≤0.080 19.000-22.000 1.800-2.300 0.350-0.750 0.350-0.750 0.900-1.300 0.400 0.800 ≤3.000 0.020 0.012 Bal.

Table 2. Laser process parameters
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Table 2. Laser process parameters
Parameter Value
Pulse energy /J 8
Laser pulse width /ns 16
Laser wavelength /nm 1053
Spot diameter /mm 3
Overlapping rate /% 50

Table 3. Thermal relaxation of residual stress in LSP GH3039 at 600 ℃
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Table 3. Thermal relaxation of residual stress in LSP GH3039 at 600 ℃
Holding time /h 0.5 1 5 10
Surface residual stress /MPa -461.1 -441.9 -422.7 -385.3

Table 4. Tensile test results of GH3039 at 600 °C
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Table 4. Tensile test results of GH3039 at 600 °C
Performance Before LSP After LSP
B1 B2 B3 LSP1 LSP2 LSP3
Ultimate tensile strength /MPa 660.3 652.7 646.9 697.2 717.8 700.1
Elongation /% 50.8 51.4 52.5 49.6 48.3 49.1

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Jianyun Xiang, Maozhong Ge, Taiming Wang. Effect of Laser Shock Peening on High-Temperature Tensile Property of GH3039 Superalloy[J]. Laser & Optoelectronics Progress, 2022, 59(7): 0716002

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