Effect of Laser Shock Peening on Surface Integrity of GH3039 Superalloys

Zhou Wen; Ge Maozhong; Wang Taiming; Xiang Jianyun

doi:10.3788/LOP202158.0314001

Laser & Optoelectronics Progress, Volume. 58, Issue 3, 3140011(2021)

Effect of Laser Shock Peening on Surface Integrity of GH3039 Superalloys

Zhou Wen¹, Ge Maozhong^1、*, Wang Taiming², and Xiang Jianyun³

Author Affiliations

¹School of Mechanical Engineering, Jiangsu University of Technology, Changzhou , Jiangsu 213001, China

²China Airlines Changzhou Lanxiang Machinery Co., Ltd., Changzhou , Jiangsu 213022, China

³School of Modern Equipment Manufacturing, Changzhou Institute of Industry Technology, Changzhou , Jiangsu 213164, China

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Figures & Tables(12)

Fig. 1. Surface 3D morphologies under different conditions.(a) Without LSP； (b) 1 impact； (c) 2 impacts； (d) 3 impacts

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Fig. 2. Measurement results of surface roughness under different numbers of impacts

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Fig. 3. Microhardness along depth direction of GH3039 superalloy under different numbers of impacts

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Fig. 4. Residual stress distribution along depth direction of GH3039 superalloy under different numbers of impacts

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Fig. 5. Microstructure of GH3039 superalloy and local magnification under different numbers of impacts.(a)(b) Without LSP; (c)(d) 1 impact; (e)(f) 2 impacts; (g)(h) 3 impacts

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Fig. 6. XRD patterns of GH3039 superalloy and local magnification under different numbers of impacts.(a) XRD patterns; (b) local magnification

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Table 1. Chemical compositions of GH3039 superalloy (mass fraction, %)
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Table 1. Chemical compositions of GH3039 superalloy (mass fraction, %)
Chemical composition C Cr Al Ti Mo Nb Fe Si S Mn P Ni
Value ≤0.08 19‒22 0.35‒0.75 0.35‒0.75 1.8‒2.3 0.90‒1.30 3.00 ≤0.80 ≤0.012 0.40 0.02 Bal.

Table 2. Mechanical properties of GH3039 at room temperature
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Table 2. Mechanical properties of GH3039 at room temperature
Mechanical property Tensile strength /MPa Yield strength /MPa Elongation /%
Value 876 764 40

Table 3. Technological parameters used for laser shock peening
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Table 3. Technological parameters used for laser shock peening
Parameter Value
Pulse energy /J 8
Laser pulse duration /ns 20
Laser wavelength /nm 1053
Repetition rate /Hz 10
Spot diameter /mm 3
Overlapping rate /% 30

Table 4. Technological parameters for electro-polishing experiment
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Table 4. Technological parameters for electro-polishing experiment
Parameter Voltage /V Electric current /A Electrolysis rate /（μm·s^-1） Room temperature /℃
Value 18‒22 6‒8 0.8 20

Table 5. Surface residual stress of GH3039 superalloy under different numbers of impacts
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Table 5. Surface residual stress of GH3039 superalloy under different numbers of impacts
Number of impacts Without LSP 1 impact 2 impacts 3 impacts
Surface residual /MPa 47.3 -269.7 -303.6 -334.4

Table 6. Full widths at half maximum of diffraction peaks in 43.6°?44.6° range under different numbers of impacts
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Table 6. Full widths at half maximum of diffraction peaks in 43.6°?44.6° range under different numbers of impacts
Number of impacts Without LSP 1 impact 2 impacts 3 impacts
FWHM /rad 0.139 0.252 0.283 0.301

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Zhou Wen, Ge Maozhong, Wang Taiming, Xiang Jianyun. Effect of Laser Shock Peening on Surface Integrity of GH3039 Superalloys[J]. Laser & Optoelectronics Progress, 2021, 58(3): 3140011

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