Anisotropy of Mechanical Properties of Laser-Cladding-Deposited TC4 Titanium Alloy Containning Boron

Hao Huo; Zhaoyang Liang; Anfeng Zhang; Xiaoxing Zhang; Jinzhi Zhang; Yuyue Wang

doi:10.3788/CJL201946.1202008

Chinese Journal of Lasers, Volume. 46, Issue 12, 1202008(2019)

Anisotropy of Mechanical Properties of Laser-Cladding-Deposited TC4 Titanium Alloy Containning Boron

Hao Huo¹, Zhaoyang Liang², Anfeng Zhang^1、*, Xiaoxing Zhang³, Jinzhi Zhang¹, and Yuyue Wang³

Author Affiliations

¹State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, China

²Chinese People's Liberation Army 63850 Army, Baicheng, Jilin 137000, China

³State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China

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Abstract Get PDF(in Chinese)

Figures & Tables(13)

Fig. 1. Working principle of LCD technology^[13]

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Fig. 2. Size of standard tensile specimen

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Fig. 3. Dimensional schematic of horizontal and vertical specimens. (a) Vertical specimen; (b) horizontal specimen

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$Microstructures of deposited LCD-TC4 with different boron mass fractions. (a) 0; (b) 0.025%; (c) 0.050%; (d) 0.075%;(e) 0.100%$

Fig. 4. Microstructures of deposited LCD-TC4 with different boron mass fractions. (a) 0; (b) 0.025%; (c) 0.050%; (d) 0.075%;(e) 0.100%

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$SEM morphologies of tensile fractures of deposited LCD-TC4 with different boron mass fractions. (a) 0.025%; (b) 0.050%; (c) 0.075%; (d) 0.100%$

Fig. 5. SEM morphologies of tensile fractures of deposited LCD-TC4 with different boron mass fractions. (a) 0.025%; (b) 0.050%; (c) 0.075%; (d) 0.100%

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Fig. 6. Mechanical properties of different LCD-TC4 specimens

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Fig. 7. Microstructural morphologies of LCD-TC4 specimens prepared under different process methods. (a) Non-induction heating with boron; (b) induction heating with boron; (c) non-induction heating and heat treatment with boron; (d) induction heating and heat treatment with boron

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Fig. 8. Anisotropy of LCD-TC4 prepared under different process methods

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Fig. 9. Microstructural morphologies of LCD-TC4 with boron in transverse and longitudinal directions after heat treatment. (a) Horizontal direction; (b) vertical direction

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Table 1. Main chemical compositions of TC4 powder and TC4 substrate^[13]
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Table 1. Main chemical compositions of TC4 powder and TC4 substrate^[13]
TC4 Mass fraction /%
Al V Fe C O N H Ti
Powder 6.1 4.1 0.10 0.01 0.13 <0.01 0.001 Bal.
Substrate 6.2 4.3 0.13 0.02 0.12 0.01 0.002 Bal.

Table 2. Process parameters of LCD
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Table 2. Process parameters of LCD
Laserpower /W Scanningspeed /(mm·s^-1) Powderdelivery /(g·min^-1) Lapdistance /mm Liftamount /mm Powerdensity /(J·mm^-2)
180 10 2.5 0.2 0.1 30.5

Table 3. Results of tensile test of deposited LCD-TC4 specimens with different boron mass fractions

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Table 3. Results of tensile test of deposited LCD-TC4 specimens with different boron mass fractions

Mass fraction of boron /%	Tensile strength /MPa	Yield strength /MPa	Elongation /%	Reduction of area /%
0	1200±10	1135±8	5.1±2.5	17.1±2.6
0.025	1052±5	975±6	11.2±2.7	27.7±2.6
0.050	1136±6	1048±8	11.5±0.2	33.5±5.3
0.075	1147±3	1057±9	10.7±2.8	19.6±4.3
0.100	1158±5	1066±7	10.5±3.7	12.7±5.3
ASTM B381-05	895	825	8	25

Table 4. Tensile test data of boron-containing LCD-TC4 samples in different directions before and after heat treatment

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Table 4. Tensile test data of boron-containing LCD-TC4 samples in different directions before and after heat treatment

Process method	Direction	Tensilestrength /MPa	Yiledstrength /MPa	Elongation /%	Reduction ofarea /%
Process 1	H	1149±7	1050±6	4.30±0.70	13.5±1.2
	V	1063±3	960±4	12.10±0.60	31.7±2.7
Process 2	H	1058±4	953±5	8.80±0.50	22.7±0.9
	V	1035±9	945±7	13.50±1.30	41.5±2.7
Process 3	H	1174±9	1093±8	9.75±0.75	21.5±0.5
	V	1136±6	1048±8	11.50±0.20	33.5±5.3
Process 4	H	1043±4	968±5	16.70±0.80	37.3±2.1
	V	1051±4	951±2	16.00±0.40	36.0±1.0
ASTM B381-05		895	825	≥8.00	≥25.0

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Hao Huo, Zhaoyang Liang, Anfeng Zhang, Xiaoxing Zhang, Jinzhi Zhang, Yuyue Wang. Anisotropy of Mechanical Properties of Laser-Cladding-Deposited TC4 Titanium Alloy Containning Boron[J]. Chinese Journal of Lasers, 2019, 46(12): 1202008

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