论文信息 - Simulation research on influence of scanning pattern on temperature evolution in SLS/SLM of Ti6Al4V powder

Simulation research on influence of scanning pattern on temperature evolution in SLS/SLM of Ti6Al4V powder

A 3D finite element model is used to analyse the non-linear behaviours of thermal conductivity and of specific heat due to temperature changes, phase transformations and powder-to-solid transitions. Compared to the traditional 'S' scanning pattern, the influences of three kinds of fractal scanning patterns on the evolution of sintering temperature are investigated by using the FE model. It is shown that different scanning patterns have strong influences on the temperature distribution and the fractal scanning patterns can make the temperature distribution much more symmetrical than that of the 'S' scanning pattern. In addition, powder-to-solid transition also has an obvious influence on the temperature distribution.

Hongzan Bin | H. Bin | Liang Ma | Liang Ma

[1] V. Romano,et al. A model for the interaction of near-infrared laser pulses with metal powders in selective laser sintering , 2002 .

[2] K. Osakada,et al. Finite element analysis of single layer forming on metallic powder bed in rapid prototyping by selective laser processing , 2002 .

[3] L. Froyen,et al. Binding Mechanisms in Selective Laser Sintering and Selective Laser Melting , 2004 .

[4] H. Bin,et al. Temperature and stress analysis and simulation in fractal scanning-based laser sintering , 2007 .

[5] Gideon Levy,et al. RAPID MANUFACTURING AND RAPID TOOLING WITH LAYER MANUFACTURING (LM) TECHNOLOGIES, STATE OF THE ART AND FUTURE PERSPECTIVES , 2003 .

[6] Jean-Pierre Kruth,et al. Basic powder metallurgical aspects in selective metal powder sintering , 1996 .

[7] S. Das. Physical Aspects of Process Control in Selective Laser Sintering of Metals , 2003 .

[8] Amir Khajepour,et al. Three-dimensional finite element modeling of laser cladding by powder injection: Effects of powder feedrate and travel speed on the process , 2003 .

[9] Andrey V. Gusarov,et al. Mechanisms of selective laser sintering and heat transfer in Ti powder , 2003 .

[10] L. Froyen,et al. Lasers and materials in selective laser sintering , 2002 .

[11] Rémy Glardon,et al. 3D FE simulation for temperature evolution in the selective laser sintering process , 2004 .