Abstract
This study focused on selective laser sintering (SLS) at different preset powder thickness, temperature, microstructure and discuss difference of porosity. Scanning process is completed with a preset initial powder thickness and movement of laser light source applied to the surface of the powder. Numerical analysis used finite element analysis software –ANSYS to simulate the moving heat source with uncoupled thermo-mechanical approach, and discussed different laser power and preset power thickness at the sintering temperature under different moving speed at a corner point. The experiments were performed by heating with Nd-YAG laser at a wavelength of 1064 nm at a fixed powder ratio of 4: 1 (stainless steel: copper), and using scanning galvanometer, incorporated with control software to control moving track and scanning pitch. Laser power, scanning speed and preset powder thickness were selected as experimental parameters, where the morphology of laser sintering specimen with porosity was inspected. Among the results of simulation and experiments, it suggested that the formability of the laser sintering specimen came up better under increasing preset thickness of powder and laser power, as well as lower scanning speed; however, if the scanning speed is up to 0.5mm/s, the laser sintering specimens would ruptured with warpage.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
