Influence of surface heating level and scanning velocity on the hardened by laser track width

2006 ◽  
Author(s):  
Bogusław Grabas ◽  
Magdalena Najgeburska ◽  
Łukasz Sliwka ◽  
Magdalena Maj
Keyword(s):  
Surface Heating ◽  
Laser Track ◽  
Track Width ◽  
Scanning Velocity

scholarly journals An Empirical Approach for the Development of Process Parameters for Laser Powder Bed Fusion

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5400 ◽  
Author(s):  
Aron Pfaff ◽  
Martin Jäcklein ◽  
Max Schlager ◽  
Wilfried Harwick ◽  
Klaus Hoschke ◽  
...  
Keyword(s):  
Process Parameters ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Laser Track ◽  
Initial Development ◽  
Track Width ◽  
Near Surface ◽  
Powder Bed ◽  
Single Laser ◽  
Target Values

For certain additive manufacturing technologies the choice of available materials is currently limited. The development of process parameters is especially elaborate for powder bed technologies. Currently, there is no common approach concerning the procedure and documentation. This work proposes a methodology for the initial development of process parameters for new L-PBF (laser powder bed fusion) alloys. Key elements are the examination of the laser–powder-bed interaction by single laser track experiments and an iterative design of experiment (DoE) approach for the development of volumetric parameters. Two types of single laser track experiments are presented and provide information regarding the laser track width and depth as well as the resulting surface roughness and melt pool classification. Based on the information gained, suitable process windows for a DoE study can be defined by avoiding parameter settings unsuitable for production or measurement. Gradually, input variables are identified and iterative steps reduce the process window in order to optimize the desired target values. Near-surface exposure parameters are developed by a one-dimensional parameter variation and metallographic investigations. The approach is primarily designed for the initial development of process parameters for new L-PBF alloys. However, the information gained can also be used to optimize established parameter sets regarding new target values (productivity, mechanical properties), optimize process parameters for specific components or for a microstructural design.

Comments on "Transient Stresses in Solids Induced by Radiant Surface Heating"

AIAA Journal ◽  
1965 ◽  
Vol 3 (12) ◽  
pp. 2352a-2352a
Author(s):  
RAYMOND M. MEASURES
Keyword(s):  
Surface Heating

Fabrication of SiC Particulates Reinforced MoSi2 Composite Coating by Laser Cladding

2008 ◽  
Vol 373-374 ◽  
pp. 304-307
Author(s):  
Sen Yang ◽  
Ming Run Wang ◽  
Tao Gong ◽  
Wen Jin Liu
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Continuous Wave ◽  
Steel Substrate ◽  
Laser Output Power ◽  
Scanning Velocity ◽  
Sic Particulates ◽  
Metallurgical Bond ◽  
Improve Wear Resistance

In order to improve wear resistance of carbon steel, laser cladding experiments were carried out using a 3kW continuous wave CO2 laser. The diameter of the laser beam was 3-5mm, the scanning velocity was 3-10mm/s, and the laser output power was 1.0-1.3kW. The experimental results showed that MoSi2/SiCP composites coating could be in-situ synthesized from mixture powders of molybdenum, silicon and SiC by laser cladding. A good metallurgical bond between the coating and the substrate could be achieved. The microstructures of the coating were mainly composed of MoSi2, SiC and FeSiMo phases. The average microhardness of the coating was about HV0.21300, about 6.0 times larger than that of steel substrate.

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