Establishment of Laser Sintering Technique for Titanium Powder

2007 ◽  
Vol 534-536 ◽  
pp. 465-468 ◽  
Author(s):  
Hideshi Miura ◽  
Hiroyuki Maeda ◽  
Makoto Uemura ◽  
Teruie Takemasu ◽  
Masaaki Otsu
Keyword(s):  
Tensile Strength ◽  
Mechanical Strength ◽  
Surface Texture ◽  
Titanium Powder ◽  
Adhesive Bonding ◽  
Bending Strength ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Maximum Tensile Strength

This paper investigates the characteristic of single-layered and multi-layered compacts made by selective laser sintering using titanium powder. The surface texture and tensile strength were investigated by using single-layered compacts. There were few defects in surface of specimen laser sintered in vacuum, and the roughness was smoother than that of the specimen laser sintered in argon. Maximum tensile strength of single-layered compact laser sintered in vacuum was about 200MPa. The shrinkage and mechanical strength were investigated by using multi-layered compacts. There was a unique tendency in the shrinkage of multi-layered compacts, which the density was around 75% and the adhesive bonding was not observed between layers, resulted in 70MPa of maximum bending strength and 50MPa of maximum tensile strength.

scholarly journals Mechanical Properties of Selective Laser Sintering Pure Titanium and Ti-6Al-4V, and Its Anisotropy

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5081
Author(s):  
Yuu Harada ◽  
Yoshiki Ishida ◽  
Daisuke Miura ◽  
Satoru Watanabe ◽  
Harumi Aoki ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Tensile Strength ◽  
Titanium Powder ◽  
Selective Laser Sintering ◽  
Pure Titanium ◽  
Color Difference ◽  
Laser Sintering ◽  
Great Performance ◽  
Dental Applications

Selective laser sintering (SLS) is being developed for dental applications. This study aimed to investigate the properties of Ti-6Al-4V and pure titanium specimens fabricated using the SLS process and compare them with casting specimens. Besides, the effect of the building direction on the properties of the SLS specimens was also investigated. Specimens were prepared by SLS using Ti-6Al-4V powder or pure titanium powder. Casting specimens were also prepared using Ti-6Al-4V alloys and pure titanium. The mechanical properties (tensile strength and elongation), physical properties (surface roughness, contact angle, and Vickers hardness); corrosion resistors (color difference and corrosion), and surface properties (chemical composition and surface observation) were examined. Both Ti-6Al-4V and pure titanium specimens produced using the SLS process had comparable or superior properties compared with casting specimens. In comparing the building directions, specimens fabricated horizontally to the printing platform showed the greatest tensile strength, and the surface roughness scanned in the horizontal direction to the platform showed the smallest. However, there was no significant effect on other properties. Thus, the SLS process with Ti-6Al-4V powder and pure titanium powder has great performance for the fabrication of dental prosthesis, and there is a possibility for it to take the place of conventional methods.

Study on Mechanical Properties Enhancement of Post Processing WPC Powder Selective Laser Sintering Parts

2010 ◽  
Vol 113-116 ◽  
pp. 1845-1848 ◽  
Author(s):  
Wei Liang Zeng ◽  
Yan Ling Guo ◽  
Zong Sheng Xin ◽  
Kai Yi Jiang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Impact Strength ◽  
Bending Strength ◽  
Low Cost ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Post Processing ◽  
Plastic Composite ◽  
Rp Process

In this paper, Wood-Plastic Composite(WPC) is successfully developed to make parts by Selective Laser Sintering(SLS) rapid prototyping (RP) process according to its advantages, such as green biological, wood texture and recycled, but the most important advantage is low-cost. With optimal design of components, the parts made by WPC have good mechanical properties as well as with good laser sintering properties. In order to further improve the mechanical properties of the parts, the post-processing–infiltrating with wax–is introduced. Through post-processing, the void fraction is decreased from from 51% to 7%, the mechanical properties are significantly improved, the average tensile strength, bending strength, impact strength are 1.214 MPa, 2.73 MPa and 1.4125 kJ/m2, compared with those without post processing, the tensile strength is 87 times, the bending strength is 4.7 times and impact strength is 2.5 times, respectively.

Temperature measurements during selective laser sintering of titanium powder

2004 ◽  
Vol 44 (12-13) ◽  
pp. 1293-1296 ◽  
Author(s):  
P. Fischer ◽  
M. Locher ◽  
V. Romano ◽  
H.P. Weber ◽  
S. Kolossov ◽  
...  
Keyword(s):  
Titanium Powder ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Temperature Measurements

scholarly journals Selective Laser Sintering (SLS) and Post-Processing of Prosopis Chilensis/Polyethersulfone Composite (PCPC)

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3034
Author(s):  
Aboubaker I. B. Idriss ◽  
Jian Li ◽  
Yangwei Wang ◽  
Yanling Guo ◽  
Elkhawad A. Elfaki ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Particle Distribution ◽  
Low Cost ◽  
Selective Laser Sintering ◽  
Single Layer ◽  
Dimensional Accuracy ◽  
Laser Sintering ◽  
Raw Material ◽  
Post Processing ◽  
Prosopis Chilensis

The range of selective laser sintering (SLS) materials is currently limited, and the available materials are often of high cost. Moreover, the mechanical strength of wood–plastic SLS parts is low, which restricts the application of a SLS technology. A new composite material has been proposed to address these issues, while simultaneously valorizing agricultural and forestry waste. This composite presents several advantages, including reduced pollution associated with waste disposal and reduced CO2 emission with the SLS process in addition to good mechanical strength. In this article, a novel and low-cost Prosopis chilensis/polyethersulfone composite (PCPC) was used as a primary material for SLS. The formability of PCPC with various raw material ratios was investigated via single-layer experiments, while the mechanical properties and dimensional accuracy of the parts produced using the various PCPC ratios were evaluated. Further, the microstructure and particle distribution in the PCPC pieces were examined using scanning electron microscopy. The result showed that the SLS part produced via 10/90 (wt/wt) PCPC exhibited the best mechanical strength and forming quality compared to other ratios and pure polyethersulfone (PES), where bending and tensile strengths of 10.78 and 4.94 MPa were measured. To improve the mechanical strength, post-processing infiltration was used and the PCPC-waxed parts were enhanced to 12.38 MPa and 5.73 MPa for bending and tensile strength.

Design Method for Inner Structure of Injection Mold Fabricated by Metal Laser Sintering

2012 ◽  
Vol 6 (5) ◽  
pp. 584-590 ◽  
Author(s):  
Hiroshi Koresawa ◽  
◽  
Hirofumi Fukumaru ◽  
Michio Kojima ◽  
Jun Iwanaga ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Design Method ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Optimization Method ◽  
Laser Sintering ◽  
Sintered Body ◽  
Sintering Process

This paper discusses design methods for the internal structure of molds used in production utilizing metal laser sintering combined with high speedmilling which selectively sinters metal powder to form a three dimensional mold. This milling technique is characterized by the fact that the selective laser sintering process and milling process are carried out in alternating sequence, achieving the level of processing accuracy demanded of mold production. In addition, in the selective laser sintering process, because the mechanical strength of the sintered body (Young’s Modulus) is variable, suitable interior structures that consider dynamic conditions are expected. However, in the current state of design, this structure is determined experimentally, and there is a high possibility of incurring unnecessary production time and high costs. In this paper, we investigate a method that incorporates an optimization method using stress that occurs within the structure interior, obtains the interior topological structure as a Young’s Modulus distribution, and designs a suitable interior structure using this distribution. As a result of investigation using numerical analysis, we obtained a structure that reduces the volume of the sintered body, having high mechanical strength in comparison with a conventional structure while improving structural rigidity.

scholarly journals Development of Selective Laser Sintering for Titanium Powder-2nd Report

2007 ◽  
Vol 54 (10) ◽  
pp. 707-712 ◽  
Author(s):  
Hideshi Miura ◽  
Yu Nagata ◽  
Hideki Ishibashi ◽  
Makoto Uemura ◽  
Masaaki Otsu
Keyword(s):  
Titanium Powder ◽  
Selective Laser Sintering ◽  
Laser Sintering

Study on the polymer material infiltrating metallic parts by selective laser sintering of 3D printing

2018 ◽  
Vol 24 (9) ◽  
pp. 1539-1543
Author(s):  
Jibing Chen ◽  
Nong Wan ◽  
Juying Li ◽  
Zhanwen He
Keyword(s):  
Tensile Strength ◽  
Polymer Material ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Polymer Materials ◽  
Gravimetric Analysis ◽  
Mass Ratio ◽  
Content Type ◽  
Metal Parts ◽  
Metallic Parts

Purpose Metal green parts fabricated by indirect selective laser sintering (SLS) have lower mechanical properties, and thus, they cannot satisfy practical application. To enhance their performance, two polymer resins were compounded as a modified material to infiltrate into the metal parts by SLS. Design/methodology/approach The viscosity and glass-transition temperature were tested by a viscometer and differential scanning calorimetry, respectively. The microstructure and morphology of the interface of parts by polymer resin infiltrated were observed to be using scanning electron microscopy. The tensile strength of sample parts was tested, too. The temperature tolerances of two mass ratio polymer materials were tested and compared by thermo-gravimetric analysis (TGA). Findings Compared to those without being polymer material infiltrated, the results of test showed that the tensile strength of the metallic parts is enhanced obviously, about four times. In addition, the analysis of TGA showed that the resin of mass ratio of 2:1 can be endured up to 200° and can be used as infiltrating materials for metal parts. Originality/value Therefore, plastic injection mold and function part can be manufactured by this method.

Investigation into Indirect Selective Laser Sintering Alumina Ceramic Parts Combined with Cold Isostatic Pressing

2012 ◽  
Vol 217-219 ◽  
pp. 2217-2221 ◽  
Author(s):  
Kai Liu ◽  
Chen Hui Li ◽  
Wen Ting He ◽  
Yu Sheng Shi ◽  
Jie Liu
Keyword(s):  
Bending Strength ◽  
Orthogonal Experiment ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Cold Isostatic Pressing ◽  
Alumina Ceramic ◽  
Alumina Powder ◽  
Isostatic Pressing ◽  
Scan Speed ◽  
Resin Binder

To obtain complex shape alumina ceramic parts, a composite powder of epoxy resin binder E-06 and alumina powder are laser sintered combined with cold isostatic pressing(CIP). An orthogonal experiment is carried out to probe the influencing factors of selective laser sintering (SLS) alumina green parts. When preheating temperature, laser power, scan speed, scan spacing and layer thickness are, respectively, 60°C,14 w, 2000 mm/s, 0.10 mm/s and 0.10 mm, the density and bending strength of alumina parts are relatively high. Then, airproof canning prepared for CIP is manufactured in the vacuum environment. Finally, the optimized SLS/CIP alumina parts are degreased and sintered in 1600 °C to produce crack-free alumina parts. The sintered relative density of the parts however is limited to only 57% but the forming integrity during SLS and CIP remains after sintering.

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