Mechanical Properties of Porous Ti-6Al-4V Titanium Alloys Fabricated by Selective Laser Melting

Qing Li; Guorui Zhao; Xingchen Yan; Wenyou Ma; Hongya Yu; Min Liu

doi:10.3788/LOP56.011403

Laser & Optoelectronics Progress, Volume. 56, Issue 1, 011403(2019)

Mechanical Properties of Porous Ti-6Al-4V Titanium Alloys Fabricated by Selective Laser Melting

Qing Li^1,2, Guorui Zhao², Xingchen Yan², Wenyou Ma², Hongya Yu¹, and Min Liu^2、*

Author Affiliations

¹ School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China

² National Engineering Laboratory for Modern Materials Surface Engineering Technology, Key Laboratory of Guangdong for Modern Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, Guangdong 510651, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(12)

Fig. 1. Micro-morphology and size distribution of Ti-6Al-4V powder. (a) Morphology; (b) size distribution

Download full size

Fig. 2. Octahedron model and sample. (a) Octahedron unit cell; (b) basic parameters of octahedron unit; (c) as-built sample model; (d) as-built sample

Download full size

Fig. 3. Morphologies of porous Ti-6Al-4V alloys with different pore sizes

Download full size

Fig. 4. Phase patterns of as-received powder and as-printed porous Ti-6Al-4V alloy

Download full size

Fig. 5. Porous Ti-6Al-4V alloy. (a) Cross-section of strut; (b) microstructure

Download full size

Fig. 6. Relationship between performance parameter and relative density. (a) Elastic modulus; (b) compressive strength

Download full size

$(a) Compressive stress-strain curve and (b) fracture of porous Ti-6Al-4V alloy$

Fig. 7. (a) Compressive stress-strain curve and (b) fracture of porous Ti-6Al-4V alloy

Download full size

$(a) Fracture site and (b) fracture morphology of porous Ti-6Al-4V alloy after compression test$

Fig. 8. (a) Fracture site and (b) fracture morphology of porous Ti-6Al-4V alloy after compression test

Download full size

Table 1. Chemical compositions of Ti-6Al-4V powder (mass fraction, %)
View table
Table 1. Chemical compositions of Ti-6Al-4V powder (mass fraction, %)
Element Al V O N C H Fe Ti
Powder /% 5.5-6.5 3.5-4.5 0.13 0.03 0.08 0.012 0.25 Bal.

Table 2. Process parameters for fabrication of Ti-6Al-4V alloys by SLM
View table
Table 2. Process parameters for fabrication of Ti-6Al-4V alloys by SLM
Parameter Laserpower /W Scanningspeed /(mm·s^-1) Hatchdistance /μm Layerthickness /μm
Value 240 1200 140 30

Table 3. Parameters of porous Ti-6Al-4V alloy structures

View table

Table 3. Parameters of porous Ti-6Al-4V alloy structures

Parameter	1	2	3	4	5	6
Porosity,nominal /%	55	55	55	65	65	65
Porosity, dryweighting /%	45	48	51	50	53	57
Density /(g·mm^-3)	2.43	2.30	2.15	2.18	2.07	1.86
Pore size,nominal /μm	400	500	600	400	500	600
Pore size,SEM /μm	388±44	456±41	543±45	358±46	453±52	545±58
Strut diameter,nominal /μm	222	266	310	181	216	254
Strut diameter,SEM /μm	324±42	379±48	448±39	295±67	352±36	369±37

Table 4. Elastic modulus and compressive strength of porous Ti-6Al-4V alloy
View table
Table 4. Elastic modulus and compressive strength of porous Ti-6Al-4V alloy
Parameter 1 2 3 4 5 6
Relative density 0.548 0.519 0.489 0.495 0.467 0.420
Elasticmodulus /GPa 25.7 24.5 21.1 21.5 18.9 15.1
Compressivestrength /MPa 351.6 319.1 277.1 289.0 239.9 223.1

Tools

Get Citation

Copy Citation Text

Qing Li, Guorui Zhao, Xingchen Yan, Wenyou Ma, Hongya Yu, Min Liu. Mechanical Properties of Porous Ti-6Al-4V Titanium Alloys Fabricated by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2019, 56(1): 011403

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites