Effect of Solution‑Aging Treatment on Corrosion Resistance of Ti6Al4V via Laser Wire Vacuum Additive Manufacturing

Xueping Ding; Qi Zhang; Honglin Ma

doi:10.3788/CJL230634

Chinese Journal of Lasers, Volume. 50, Issue 24, 2402305(2023)

Effect of Solution‑Aging Treatment on Corrosion Resistance of Ti6Al4V via Laser Wire Vacuum Additive Manufacturing

Xueping Ding^1、*, Qi Zhang², and Honglin Ma²

Author Affiliations

¹School of Material Science and Engineering, Chongqing University of Technology, Chongqing 400054, China

²Chongqing Key Laboratory of Additive Manufacturing Technology and Systems, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China

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Abstract Get PDF(in Chinese)

Figures & Tables(16)

Fig. 1. Experimental equipment for laser wire vacuum additive manufacturing. (a) Overall equipment; (b) equipment in vacuum chamber; (c) wire feeding system; (d) laser and wire arrangement

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Fig. 2. Additive manufacturing of thin-wall part. (a) Figure of liquid bridge transfer; (b) sample

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$Polarization curves of different samples in NaCl solution with mass fraction of 3.5%$

Fig. 3. Polarization curves of different samples in NaCl solution with mass fraction of 3.5%

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Fig. 4. EIS measurement results. (a) Nyquist plots; (b)(c) Bode plots; (d) equivalent circuit model

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Fig. 5. XPS full spectra of passive films formed on different sample surfaces

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Fig. 6. High-resolution XPS spectra of passive films formed on different sample surfaces. (a)(d)(g) Ti 2p; (b)(e)(h) O 1s; (c)(f)(i) Al 2p

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Fig. 7. Valence distributions of Ti elements in passive films formed on different sample surfaces

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Fig. 8. IPFs of different samples. (a) AM; (b) SAT500; (c) SAT600

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Fig. 9. Phase distributions in different samples

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Fig. 10. Grain size distributions in different samples. (a) AM; (b) SAT500; (c) SAT600

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Fig. 11. KAM maps of different samples. (a) AM; (b) SAT500; (c) SAT600

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Fig. 12. Grain boundary distributions and statistics results in different samples. (a)(d) AM; (b)(e) SAT500; (c)(f) SAT600

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Table 1. Process parameters of solution aging heat treatment
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Table 1. Process parameters of solution aging heat treatment
Sample Temperature /°C Time /h Cooling method
SAT500 950 1 Air cooling
500 4 Air cooling
SAT600 950 1 Air cooling
600 4 Air cooling

Table 2. Corrosion potential and corrosion current density values of different samples
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Table 2. Corrosion potential and corrosion current density values of different samples
Sample E_corr /V i_corr /（μA/cm²）
AM -0.213 2.595
SAT500 -0.175 0.035
SAT600 -0.238 0.351

Table 3. EIS parameters of equivalent circuit for test samples

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Table 3. EIS parameters of equivalent circuit for test samples

Sample

R_s /

（Ω·cm²）

CPE₁ /

$(S \cdot s^{n_{1}} / c m^{2})$

n₁

R_f /

（10⁴Ω·cm²）

CPE₂ /

$(S \cdot s^{n_{2}} / c m^{2})$

n₂

R_ct /

（Ω·cm²）

χ²

181.6

2.999×10^-5

0.4834

2.341

9.797×10^-7

0.6234

758.300

3.024×10^-3

SAT500

172.4

3.323×10^-5

0.8093

4.08

1.223×10^-4

0.8303

1.461×10⁵

3.046×10^-4

SAT600

91.02

1.357×10^-4

0.6867

3.975

3.042×10^-5

0.9199

9.328

7.323×10^-4

Table 4. Results of peak fitting of high-resolution XPS spectra

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Table 4. Results of peak fitting of high-resolution XPS spectra

Peak	Binding energy /eV			Chemical state
Peak	AM	SAT500	SAT600	Chemical state
Ti 2p	453.94	‒	454.07	Ti
	456.8	456.90	456.90	Ti₂O₃
	458.46	458.43	458.80	TiO₂
	459.94	‒	460.07	Ti
	462.5	462.60	462.60	Ti₂O₃
	464.16	464.13	464.50	TiO₂
O 1s	530.73	530.61	530.71	Metal oxides
O 1s	532.39	531.52	531.74	OH^-
Al 2p	74.6	74.63	74.6	Al₂O₃

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Xueping Ding, Qi Zhang, Honglin Ma. Effect of Solution‑Aging Treatment on Corrosion Resistance of Ti6Al4V via Laser Wire Vacuum Additive Manufacturing[J]. Chinese Journal of Lasers, 2023, 50(24): 2402305

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