Fabrication of ultra-low-cost pure Ti by selective laser melting using the mixed powders of hydride-dehydride titanium powders treated by ball milling and spherical powders

2020 ◽  
pp. 1-8
Author(s):  
Xin Yang ◽  
Zhaoyang Zhang ◽  
Wenping Gu ◽  
Ben Wang ◽  
Yazhuo Fan ◽  
...  
Keyword(s):  
Ball Milling ◽  
Selective Laser Melting ◽  
Low Cost ◽  
Laser Melting ◽  
Titanium Powders

Modeling the Selective Laser Melting of Multi-Component Thermoelectric Powders

2018 ◽  
Author(s):  
Yongjia Wu ◽  
Lei Zuo ◽  
Kan Sun
Keyword(s):  
Selective Laser Melting ◽  
High Performance ◽  
Low Cost ◽  
Electrical Energy ◽  
Device Fabrication ◽  
Thermoelectric Device ◽  
Laser Melting ◽  
Thermoelectric Modules ◽  
Powder Bed ◽  
Unique Method

Thermoelectrics enables thermal and electrical energy conversion or device cooling without any moving parts. It has remained a significant challenge to manufacture compact and high performance thermoelectric modules in a large volume using the conventional methods because of their drawbacks in practice, such as the long processing time and misalignment of individual thermoelectric elements. Selective laser melting (SLM) based additive manufacturing approach might offer a unique method to fabricate the low cost, reliable, highly efficient, scalable, and environmentally friendly thermoelectric modules. To understand the thermodynamic and hydrodynamic phenomenon during the SLM processing is of critical importance to ensure high quality products. In this paper, we developed a model which can be used to guide the SLM manufacturing of thermoelectric material with other nanoparticles embedded for higher thermoelectric performance. This physical model based on the continuous equations had the ability to analyze the fluid flow driven by buoyancy force and surface tension, which can be used to analyze the influence of the process parameters on the pool size, particle segregation, as well as temperature distribution within the powder bed. This information is very useful for developing robust SLM for thermoelectric device fabrication.

Selective laser melting of CP-Ti to overcome the low cost and high performance trade-off

2020 ◽  
Vol 34 ◽  
pp. 101198 ◽  
Author(s):  
Qiying Tao ◽  
Zhangwei Wang ◽  
Gang Chen ◽  
Wei Cai ◽  
Peng Cao ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
High Performance ◽  
Low Cost ◽  
Laser Melting ◽  
Trade Off ◽  
Cp Ti

Production of Rounded Reactive Composite Ti/Al Powders for Selective Laser Melting by High-Energy Ball Milling

2019 ◽  
Vol 50 (3) ◽  
pp. 1241-1247 ◽  
Author(s):  
A. A. Nepapushev ◽  
D. O. Moskovskikh ◽  
V. S. Buinevich ◽  
S. G. Vadchenko ◽  
A. S. Rogachev
Keyword(s):  
Ball Milling ◽  
Selective Laser Melting ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Laser Melting ◽  
Energy Ball

scholarly journals Mechanical Performance of Artificial Hip Stems Manufactured by Hot Forging and Selective Laser Melting Using Biocompatible Ti-15Zr-4Nb Alloy

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 732
Author(s):  
Yoshimitsu Okazaki ◽  
Jun Mori
Keyword(s):  
Selective Laser Melting ◽  
Mechanical Performance ◽  
Low Cost ◽  
Hot Forging ◽  
Fatigue Properties ◽  
Laser Melting ◽  
Custom Made ◽  
Artificial Hip ◽  
Hip Stems ◽  
Joint Prostheses

We investigated the microstructures, tensile properties, fatigue strengths, and durability limits of hot-forged Ti-15Zr-4Nb (Ti-15-4) alloy artificial hip stems. These properties were compared with those of Ti-15Zr-4Nb-4Ta (Ti-15-4-4) and Ti-6Al-4V (Ti-6-4) alloy stems annealed after selective laser melting. The tensile and fatigue properties of test specimens cut from Ti-15-4 stems annealed after hot forging were excellent compared with those of the Alloclassic Zweymüller Stepless (SL) stem, which is used globally. The 0.2% proof stress (σ0.2%PS), ultimate tensile strength (σUTS), total elongation (TE) at breaking, and fatigue strength (σFS) after 107 cycles were 919 ± 10, 983 ± 9 MPa, 21 ± 1%, and 855 ± 14 MPa, respectively. The durability limit (PD) after 5 × 106 cycles of Ti-15-4 stems was excellent compared with that of the SL stem. The σUTS values of 90°- and 0°-direction-built Ti-15-4-4 rods were 1032 ± 1 and 1022 ± 2 MPa, and their TE values were 14 ± 1% and 16 ± 1%, respectively. The σFS values of annealed 90°-direction-built Ti-15-4-4 and Ti-6-4 rods were 640 ± 11 and 680 ± 37 MPa, respectively, which were close to that of the wrought Ti-15-4 rod (785 ± 17 MPa). These findings indicate that the hot forging and selective laser melting (SLM) techniques can also be applied to the manufacture of artificial hip prostheses. In particular, it was clarified that selective laser melting using Ti-15-4-4 and Ti-6-4 powders is useful for the low-cost manufacturing of custom-made artificial joint prostheses and other prosthetic implants.

Dental root implants produced by the combined selective laser sintering/melting of titanium powders

2002 ◽  
Vol 216 (4) ◽  
pp. 267-270 ◽  
Author(s):  
N K Tolochko ◽  
V V Savich ◽  
T Laoui ◽  
L Froyen ◽  
G Onofrio ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Laser Processing ◽  
Selective Laser Sintering ◽  
Processing Parameters ◽  
Laser Sintering ◽  
Laser Melting ◽  
Porous Shell ◽  
Titanium Powders ◽  
Ti Powder ◽  
Improved Technique

Preliminary experiments were carried out for the fabrication of dental root implants using an improved technique of laser processing of Ti powders. The properties of produced samples were characterized for various processing parameters. Samples with rod and cone shapes were formed. A combined selective laser sintering (SLS) and selective laser melting (SLM) process was utilized. With this combination, the samples possessed a structure composed of two different zones, namely a remelted compact core and a sintered porous shell. The results of these experiments show that it is possible to produce dental root implants possessing the required geometry, structure and strength by appropriate laser processing of Ti powder.

scholarly journals COMPARISON BETWEEN LASER ADDITIVE MANUFACTURING AND LASER SPOT WELDING OF TITANIUM GRADE 2

2020 ◽  
Vol 6 (7) ◽  
pp. 119-122
Author(s):  
A. Barbangelo ◽  
L. C. Pedemonte
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Spot Welding ◽  
Low Cost ◽  
Laser Spot ◽  
Laser Melting ◽  
Laser Additive Manufacturing ◽  
Titanium Grade ◽  
Laser Spot Welding ◽  
Welding Technique

The microstructure and hardness of the melted area in a titanium grade 2 sample processed by Laser Spot Welding were compared to those processed by Selective Laser Melting. The results show that the materials obtained with the two processes have very similar characteristics. On the basis of what had been observed, it can be inferred that the Laser Spot Welding technique could be a low-cost way to verify the possibility of obtaining the desired properties with new alloys processed by Selective Laser Melting.

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