Thermal modeling of laser sintering of two-component metal powder on top of sintered layers via multi-line scanning

Chen, Tiebing; Zhang, Kun

doi:10.1007/s00339-006-3739-1

Cited by 26 publications

(14 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kandis, Bergman and co-workers [6,7] used a constitutive relation based on experimental measurements to account for the density change caused by sintering in SLS, and compared their simulations on polymer powders with experimentally produced parts. Their work was extended to three-dimensional parts and two-component metal powders by Zhang and co-workers [8][9][10][11][12][13], taking into account fluid flow caused by capillary and gravity forces through Darcy's law [8] or through the NavierStokes equations [13], investigating the effect of the powder layer thickness [9] and of the substrate [12], studying partial shrinkage [11]. The group of Childs developed a finite-element model for SLS/SLM using a similar viscous sintering law as Kandis and Bergman [6] to study the behavior of amorphous polymer powders [14], crystalline and glassfilled crystalline polymer powders [15], and stainless and tool steel powders [16].…”

Section: Introductionmentioning

confidence: 98%

A pragmatic model for selective laser melting with evaporation

et al. 2009

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 98%

A pragmatic model for selective laser melting with evaporation

et al. 2009

View full text Add to dashboard Cite

“…Their results indicated that an interval of scan speed existed where the remelted tracks were uniform, while the study focused on the single-line track process. A three-dimensional thermal model for the sintering of two-component metal powder was developed by T. Chen et al [13]. However, only low-melting point powder was supposed to melt in this model.…”

Section: Introductionmentioning

confidence: 99%

Effects of processing parameters on the temperature field of selective laser melting metal powder

Shi

Liu

et al. 2009

Powder Metall Met Ceram

View full text Add to dashboard Cite

Based on temperature-dependent thermophysical parameters and nonlinear phase transformation from powder to liquid, a three-dimensional transient thermal finite model of selective laser melting process is developed. Commercial ANSYS software is used to simulate the distribution of the temperature field in selective laser melting. The simulation results show that a lower scan speed, higher laser power, and a lower scan interval enable much higher maximum temperature in the powder bed and wider scan track width. The scan modes also have great influence on the temperature field. Temperature in the powder bed experiences fluctuant variation with transverse scan mode in contrast with moderate variation with lengthwise scan mode. The simulated results are compared with the experimental results and good agreement is found in scan track width.

show abstract

“…In this modelling an effective thermal conductivity is taken to evolve with the temperature while the density is kept constant. Chen and Zhang (2007) developed a three-dimensional thermal modelling for the sintering of two component metal powder with different melting temperatures. In this model only the metal powder with the low melting temperature is considered to melt and lead to partial shrinkage of the powder bed.…”

Section: Introductionmentioning

confidence: 99%