Microstructures and Properties of Cu–AISI304 Parts Fabricated by Improved Selective Laser Sintering
For fabricating complex AISI304 parts with high performance by advanced powder/metallurgy technologies, cold isostatic pressing (CIP) is introduced into selective laser sintering (SLS) combined with h...
For fabricating complex AISI304 parts with high performance by advanced powder/metallurgy technologies, cold isostatic pressing (CIP) is introduced into selective laser sintering (SLS) combined with h...
Predictive Modeling and Experimental Verification of Temperature and Concentration in Rapid Freeze Prototyping With Support Material
Rapid freeze prototyping is a solid freeform fabrication method that uses water freezing into ice as the build material. Each layer of geometry is deposited and allowed to freeze before the next layer...
Rapid freeze prototyping is a solid freeform fabrication method that uses water freezing into ice as the build material. Each layer of geometry is deposited and allowed to freeze before the next layer...
Experimental and Numerical Study of the LENS Rapid Fabrication Process
J. Manuf. Sci. Eng. -- August 2009 -- Volume 131, Issue 4, 041019 (8 pages)
doi:10.1115/1.3173952
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Several aspects of the thermal behavior of deposited stainless steel 410 (SS410) during the laser engineered net shaping (LENSTM) process were investigated experimentally and numerically. Thermal images in the molten pool and surrounding area were recorded using a two-wavelength imaging pyrometer system, and analyzed using THERMAVIZTM software to obtain the temperature distribution. The molten pool size, temperature gradient, and cooling rate were obtained from the recorded history of temperature profiles. The dynamic shape of the molten pool, including the pool size in both travel direction and depth direction was investigated, and the effect of different process parameters was illustrated. The thermal experiments were performed in a LENSTM 850 machine with a 3 kW IPG Photonics laser for different process parameters. A three-dimensional finite element model was developed to calculate the temperature distribution in the LENSTM process as a function of time and process parameters. The modeling results showed good agreement with the experimental data.
©2009 American Society of Mechanical Engineers
| History: | Received 13 November 2007; revised 25 November 2008; published 16 July 2009 | |
| doi: | http://dx.doi.org/10.1115/1.3173952 | |
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