Selective Laser Melting Bone-Compatible Pure Titanium Porous Structure

2013 ◽  
Vol 423-426 ◽  
pp. 833-836
Author(s):  
Zi Fu Li ◽  
Chun Yu Zhang ◽  
Liu Ju Qi ◽  
Xue Tong Sun
Keyword(s):  
Energy Density ◽  
Porous Structure ◽  
Selective Laser Melting ◽  
Pure Titanium ◽  
High Strength ◽  
Input Energy ◽  
Densification Behavior ◽  
Laser Melting ◽  
Commercially Pure ◽  
Input Energy Density

In this paper the effect of selective laser melting (SLM) input energy density on densification behavior and tensile strengths of commercially pure (CP) titanium was investigated. Fully dense and high strength SLM CP titanium has been obtained. A complex bone-compatible tetrakaidecahedron based porous structure has been successfully SLM-fabricated with optimized laser parameters.

Densification behavior, microstructure evolution, and wear performance of selective laser melting processed commercially pure titanium

2012 ◽  
Vol 60 (9) ◽  
pp. 3849-3860 ◽  
Author(s):  
Dongdong Gu ◽  
Yves-Christian Hagedorn ◽  
Wilhelm Meiners ◽  
Guangbin Meng ◽  
Rui João Santos Batista ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Microstructure Evolution ◽  
Pure Titanium ◽  
Densification Behavior ◽  
Commercially Pure Titanium ◽  
Laser Melting ◽  
Wear Performance ◽  
Commercially Pure

Main Defects Observed in Titanium GRADE II and 316L Stainless Steel Elements Obtained by Selective Laser Melting

2020 ◽  
Vol 308 ◽  
pp. 33-50
Author(s):  
Anna Woźniak ◽  
Marcin Adamiak
Keyword(s):  
Stainless Steel ◽  
Energy Density ◽  
Selective Laser Melting ◽  
Process Parameters ◽  
Defect Formation ◽  
Pure Titanium ◽  
Parameters Optimization ◽  
Laser Melting ◽  
Grade Ii ◽  
Titanium Grade

Selective Laser Melting SLM is one of the most popular three dimensional printing methods, which can be used for manufactured real elements (with high geometrical complexity) in many application, such as medicine, automotive or aerospace industries. The SLM final parts are characterized by high mechanical properties and satisfactory physicochemical properties. However, the properties of parts depend of process parameters optimization. In this paper, effects of processing parameters, such as laser power P, scanning speed SP, layer thickness t or point distance PD on defect formation and relative densities of manufactured elements are explored. For the purpose the stainless steel 316L and pure titanium Grade II are used. The process optimization were carried out according to the formula of energy density, which is delivered to the powder material. The stainless steel samples were divided into 12 groups, depends of the energy density. The titanium parts were printed at the same value of energy, and the process parameters are changed. The microscope observation and relative density measurements were carried out. Based on the obtained results, it can be confuted that the SLM parameters have a significant effect on the samples properties and the mechanism formed defect in both material are similar.

Influence of Selective Laser Melting Process Parameters on Densification Behavior, Surface Quality and Hardness of 18Ni300 Steel

2020 ◽  
Vol 861 ◽  
pp. 77-82
Author(s):  
Gan Li ◽  
Cheng Guo ◽  
Wen Feng Guo ◽  
Hong Xing Lu ◽  
Lin Ju Wen ◽  
...  
Keyword(s):  
Energy Density ◽  
Relative Density ◽  
Maraging Steel ◽  
Surface Quality ◽  
Selective Laser Melting ◽  
Process Parameters ◽  
Laser Power ◽  
Densification Behavior ◽  
Laser Melting ◽  
Scan Speed

This study investigated the effect of laser power (P), scan speed (v) and hatch space (h) on densification behavior, surface quality and hardness of 18Ni300 maraging steel fabricated by selective laser melting (SLM). The results indicated that the relative density of the SLMed samples has a shape increase from 73% to 97% with the laser energy density increasing from 0.5 to 2.2 J/mm2. The relative density ≥ 99% was achieved at the energy density in the range of 2.2~5.9 J/mm2. The optimum process parameters were found to be laser power of 150~200 W, scan speed of 600mm/s and hatch space of 0.105mm. In addition, it was found that the hardness increased initially with the increasing relative density up to relative density of 90% and then little relationship, but finally increase again significantly. This work provides reference for determining process parameters for SLMed maraging steel and the development of 3D printing of die steels.

Study on selective laser melting of commercially pure titanium powder

2018 ◽  
Vol 233 (7) ◽  
pp. 1794-1807 ◽  
Author(s):  
Kurian Antony ◽  
T Reghunathan Rakeshnath
Keyword(s):  
Energy Density ◽  
Laser Power ◽  
Titanium Powder ◽  
Laser Energy ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Laser Track ◽  
Laser Melting ◽  
Commercially Pure ◽  
Powder Particles

Laser additive manufacturing processes melt the powder particles using laser beam energy to form solid three-dimensional objects. This article mainly focuses on numerical analysis and experimentation of laser melting of commercially pure titanium powder. Numerical solutions to moving heat source problems were developed, and their influences on process parameters were validated. The energy density has a significant role in laser melting process. The numerical investigation demonstrates the significant effect of laser energy density on laser tracks. The laser power, distribution of powder particles, the absorptivity, density, and chemical constitution of powder materials are the main factors which influence the laser energy penetration. The absorptivity plays a vital role in consolidation phenomena of the powder layer which helps to get a denser part or layer. The experimental result clearly indicates that at lower laser speed the powder compaction is better. Temperature distribution, depth, and width of laser track were compared in this article. By investigating the observations from optical microscopic images and scanning electron microscopic images, the surface characteristics of laser-melted tracks were studied. The study on numerical and experimental results shows that the optimum condition for better laser track is laser power 45 W, laser speed 20 mm/s, and laser diameter 2.5 mm. This study provides important insights into laser parameters in the melting of commercially pure titanium powder.

Comparison of wear properties of commercially pure titanium prepared by selective laser melting and casting processes

2015 ◽  
Vol 142 ◽  
pp. 38-41 ◽  
Author(s):  
H. Attar ◽  
K.G. Prashanth ◽  
A.K. Chaubey ◽  
M. Calin ◽  
L.C. Zhang ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Wear Properties ◽  
Laser Melting ◽  
Commercially Pure
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