Equation icon  Required laser power in SLM

Use this resource: Use this resource icon
Link to this page: http://core.materials.ac.uk/search/detail.php?id=3214
View at:        
Resource type: Equation
Description: The rapid prototyping methods Selective Laser Melting (SLM) and Selective Laser Sintering (SLS) use a medium to high power laser beam to fuse adjacent powder particles together. By scanning the beam back and forth across a powder bed, a thin layer of sintered or melted material is formed. The powder bed then drops by one layer thickness, fresh powder is wiped across the surface and the process is repeated. In this way a complete 3D solid metallic model can be produced.

TeX format: {P = \frac{2rVt\rho C T_m}{1-R}}

P {P} = laser power required to cause melting (J.m-2) {J.m^{-2}}
r {r} = beam radius (m) {m}
V {V} = scan velocity (m.s-1) {m.s^{-1}}
t {t} = layer thickness (m) {m}
ρ {\rho} = powder density (kg.m-3) {kg.m^{-3}}
C {C} = specific heat capacity of powder (J.kg-1.K-1) {J.kg^{-1}.K^{-1}}
Tm {T_m} = melt temperature of powder (K) {K}
R {R} = reflectivity of powder

Keywords: rapid prototyping • energy • density • manufacturing • processing • laser • beam • sintering • melting • cutting • SLM • SLS • SLA
Categories: Science approaches
Processes > Shaping > Machining
Processes > Shaping > Powder methods
Processes > Shaping > Rapid prototyping
Processes > Surface treatments > Heat treatments
Processes > Thermal treatments > Sintering
Applications > Manufacturing & industry
Properties > Electrical, magnetic & optical > Optical
Created by: The University of Liverpool
License: This resource is released under the Creative Commons Attribution license (2.0 UK: England & Wales).
Creative Commons Attribution logo
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
View the full legal code here.
Date created: 18 August 2010
Date added: 14 September 2010
Resource ID: 3214