Effect of B on Microstructure and Tensile Properties of Laser Additive Manufactured TC4 Alloy

Qi Zhenjia; Zhang Xiaoxing; Wang Yuyue; Huo Hao; Wang Hong; Zhang Jinzhi; Zhang Anfeng

doi:10.3788/CJL202047.0602002

Chinese Journal of Lasers, Volume. 47, Issue 6, 602002(2020)

Effect of B on Microstructure and Tensile Properties of Laser Additive Manufactured TC4 Alloy

Qi Zhenjia¹, Zhang Xiaoxing¹, Wang Yuyue^1、*, Huo Hao², Wang Hong², Zhang Jinzhi², and Zhang Anfeng²

Author Affiliations

¹State Key Laboratory for Mechanical Behavior of Materials, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, China

²State Key Laboratory for Manufacturing Systems Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, China

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Figures & Tables(13)

Fig. 1. Working principle of LAM technology

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Fig. 2. Schematic of tensile specimen

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Fig. 3. Microstructures in vertical direction of LAM-alloys. (a1)(a2) TC4; (b1)(b2) TC4-0.05B; (c1)(c2) TC4-0.075B; (d1)(d2) TC4-0.1B

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Fig. 4. Size parameters of α-lath. (a) Average length and width; (b) ratio of length to width

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Fig. 5. Bright field image of TC4-0.05B

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Fig. 6. XRD patters of TC4 and TC4-0.05B alloys

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Fig. 7. Microhardness of LAM-TC4

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Fig. 8. Tensile properties of LAM-TC4. (a) Strength; (b) plasticity

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Fig. 9. Microstructure of LAM-TC4-0.05B after heat treatment. (a) OM image; (b) SEM image

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Fig. 10. Anisotropy of tensile properties of LAM-titanium alloy

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Table 1. Chemical composition of TC4 powder
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Table 1. Chemical composition of TC4 powder
Element Al V Fe C O N H
Mass fraction /% 5.95 4.20 0.10 0.015 0.105 0.007 0.0030

Table 2. Forming process parameters
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Table 2. Forming process parameters
Parameter Value
Laser power /W 180
Light spot diameter /mm 0.5
Scanning speed /(mm·s^-1) 10
Powder feeding /(g·min^-1) 2.5
Layer thickness /mm 0.1
Purity of argon 99.99%

Table 3. Room-temperature tensile properties of formed parts before and after thermal treatment

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Table 3. Room-temperature tensile properties of formed parts before and after thermal treatment

Material	Direction	Tensile strength /MPa	Yield strength /MPa	Elongation /%	Reduction of area /%
TC4	Z	1080	1004	9.0	23.0
	XY	1159	1060	4.3	13.5
TC4-0.05B	Z	1050	951	14.5	37.2
	XY	1090	962	12.2	36.0
TC4-0.05B-solution aging	Z	1042.7	968.3	16.7	37.3
	XY	1050	951	16.0	36.0

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Qi Zhenjia, Zhang Xiaoxing, Wang Yuyue, Huo Hao, Wang Hong, Zhang Jinzhi, Zhang Anfeng. Effect of B on Microstructure and Tensile Properties of Laser Additive Manufactured TC4 Alloy[J]. Chinese Journal of Lasers, 2020, 47(6): 602002

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