scholarly journals Dental Restorations of Co-Cr Using Direct Metal Laser Sintering Process

Author(s):  
Diana-Irinel Băilă ◽  
2017 ◽  
Vol 11 (14) ◽  
pp. 1921-1929 ◽  
Author(s):  
Annaig Martin‐Guennou ◽  
Yves Quéré ◽  
Eric Rius ◽  
Christian Person ◽  
Shaima Enouz‐Vedrenne ◽  
...  

Author(s):  
Bin Xiao ◽  
Yuwen Zhang

A three-dimensional model describing melting and resolidification of direct metal laser sintering of loose powders on top of sintered layers with a moving Gaussian laser beam is developed. Natural convection in the liquid pool driven by buoyancy and Marangoni effects is taken into account. A temperature transforming model is employed to model melting and resolidification in the laser sintering process. The continuity, momentum, and energy equations are solved using a finite volume method. The effects of dominant processing parameters including number of the existing sintered layers underneath, laser scanning velocity, and initial porosity on the sintering process are investigated.


2014 ◽  
Vol 903 ◽  
pp. 114-117 ◽  
Author(s):  
Izhar Abd Aziz ◽  
Brian Gabbitas ◽  
Mark Stanford

The purpose of this work is to investigate the microstructure and tensile strength of Ti6Al4V pre-alloyed powders produced by a direct metal laser sintering technique. Traditionally, Ti6Al4V products for biomedical applications were produced through hot working or machining of wrought semi-finished products. A change in the production route for manufacturing Ti6Al4V products, from the more traditional methods to an additive manufacturing route, requires an investigation of microstructure and mechanical properties because these are strongly influenced by the production route. The microstructure obtained through rapid solidification during laser sintering shows a very fine α+β lamellar morphology. There is also evidence of martensite which was expected due to high solidification rate of the liquid pool from a temperature above the β-transus during the laser sintering process. Structurally, good mechanical properties which are comparable to the bulk material were obtained.


Sign in / Sign up

Export Citation Format

Share Document