Influence of Ultra‑Slow Heating Treatment on Microstructure and Properties of Ti‑5Al‑4Mo‑3V‑2Zr‑Nb Near <bold>β</bold> Titanium Alloy Fabricated by Laser Deposition

Siyu Zhou; Mingchen Fang; Guang Yang; Zhonggang Sun; Siyuan Zhang; Changfu Li

doi:10.3788/CJL231456

Chinese Journal of Lasers, Volume. 51, Issue 20, 2002309(2024)

Influence of Ultra‑Slow Heating Treatment on Microstructure and Properties of Ti‑5Al‑4Mo‑3V‑2Zr‑Nb Near β Titanium Alloy Fabricated by Laser Deposition

Siyu Zhou^1,2, Mingchen Fang¹, Guang Yang^1、*, Zhonggang Sun³, Siyuan Zhang⁴, and Changfu Li¹

Author Affiliations

¹College of Mechanical and Electrical Engineering, Shenyang Aerospace University, Shenyang 110136, Liaoning , China

²Structure Department, Shenyang Aircraft Design and Research Institute, Aviation Industry Corporation of China, Ltd., Shenyang 110035, Liaoning , China

³College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu , China

⁴Northwest Institute for Non-Ferrous Metal Research, Xi’an 710016, Shaanxi , China

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Figures & Tables(10)

Fig. 1. LDM forming principle and sizes of tensile samples. (a) LDM principle and scanning strategy;(b) geometry and dimensions of tensile specimen

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Fig. 2. Regime of ultra-slow heating treatment

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Fig. 3. Microstructures of Ti-5Al-4Mo-3V-2Zr-Nb formed by LDM. (a)(c) Microstructures of grain boundary; (b)(d) intracrystalline microstructures

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Fig. 4. Microstructures of Ti-5Al-4Mo-3V-2Zr-Nb formed by LDM after SHT. (a)(c)(e) Microstructures of grain boundary;

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Fig. 5. Mechanism of microstructural evolution during SHT

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Fig. 6. Effect of grain boundary continuity on plasticity in Ti-5Al-4Mo-3V-2Zr-Nb. (a) Continuous grain boundary; (b) discontinuous grain boundary

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Fig. 7. Fracture morphologies of Ti-5Al-4Mo-3V-2Zr-Nb formed by LDM. (a)(c)(e) As deposited state; (b)(d)(f) after SHT

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Table 1. Chemical compositions of Ti-5Al-4Mo-3V-2Zr-Nb alloy powder
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Table 1. Chemical compositions of Ti-5Al-4Mo-3V-2Zr-Nb alloy powder
Element Ti Al Mo V Zr Nb O C N
Mass fraction /% Bal. 5.010 3.900 2.960 1.920 0.990 0.071 0.013 0.012

Table 2. LDM experimental process parameters
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Table 2. LDM experimental process parameters
Power /W Scanning velocity /（mm·s^-1） Layer thickness /mm Scanning spacing /mm Feeding pan speed /（rad·min^-1）
2500 10 0.5 2 0.8

Table 3. Tensile properties of Ti-5Al-4Mo-3V-2Zr-Nb formed by LDM after SHT
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Table 3. Tensile properties of Ti-5Al-4Mo-3V-2Zr-Nb formed by LDM after SHT
Sample Ultimate tensile strength /MPa Yield strength /MPa Elongation /%
As deposited sample 1077.5±13.3 1066.4±14.1 9.8±2.0
Sample after SHT 1015.8±18.3 990.1±18.5 15.6±1.8

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Siyu Zhou, Mingchen Fang, Guang Yang, Zhonggang Sun, Siyuan Zhang, Changfu Li. Influence of Ultra‑Slow Heating Treatment on Microstructure and Properties of Ti‑5Al‑4Mo‑3V‑2Zr‑Nb Near β Titanium Alloy Fabricated by Laser Deposition[J]. Chinese Journal of Lasers, 2024, 51(20): 2002309

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