Thermal Conductivity of Metal Powder and Consolidated Material Fabricated via Selective Laser Melting


Article Preview

Selective Laser Melting (SLM) is a direct fabrication of part through layer by layer powder deposition and successive laser beam irradiation based on Computer Aided Design (CAD) data. One of the important properties in SLM is thermal conductivity of metal powder. This is because the ability of metal powder to conduct heat will affect the consolidation process during SLM. In this paper, thermal conductivity of metal powders with different particle diameters and their mixture was analysed. Other than that, thermal conductivity of consolidated materials fabricated via SLM process was also studied. In order to measure the thermal conductivity of metal powder, a theoretically verified method which was previously developed by the authors was used. Determination of thermal conductivity of consolidated material was analysed using laser flash technique. It was found that the thermal conductivity of powder metal was influenced by bulk density and particle diameter of metal powder. In this study also, metal powders of different particle diameters were mixed with various volume ratios, and its effect was discussed. Thermal conductivity of the consolidated materials was also examined, and its relation to porosity was elaborated.



Key Engineering Materials (Volumes 523-524)

Edited by:

Tojiro Aoyama, Hideki Aoyama, Atsushi Matsubara, Hayato Yoshioka and Libo Zhou




M. R. Alkahari et al., "Thermal Conductivity of Metal Powder and Consolidated Material Fabricated via Selective Laser Melting", Key Engineering Materials, Vols. 523-524, pp. 244-249, 2012

Online since:

November 2012




[1] A. Rossencwaig and A. Gersho, Theory of the photoacoustic effect with solids, J. of Applied Physics 47, (1976) 64-69.

[2] I. H. Tavman, Effective Thermal Conductivity of Granular Porous Materials, Int. Commun. Heat Mass Transfer 23, (1996) 169-176.


[3] N. Lockmuller, J. Redgrove, and L. Kubičár, Measurement of thermal conductivity with the needle probe, High Temperatures - High Pressures, 35-36, 2, (2003)127-138.


[4] F. Albouchi, F. Mzali, and S.B. Nasrallah, Measurement of the Effective Thermal Conductivity of Powders Using a Three-Layer Structure, J. Porous Media, 10, 6, (2007) 537-549.


[5] M. Rombouts, L. Froyen, A.V. Gusarov, E.H. Bentefour, C. Glorieux, Photopyroelectric measurement of thermal conductivity of metallic powders, J. Applied Physics. 97(2005) 024905.


[6] T. Furumoto, T. Ueda, A. Hosokawa, S. Abe And T.H.C. Childs, Study on the Measurement of Physical Properties in the Metal Powder for Rapid Prototyping - Proposal of the Measurement of Thermal Conductivity, J. of Japan Soc. of Precision Eng., Vol. 73(5), (2007).


[7] H. S Carslaw, J.C. Jaeger, Conduction of Heat in Solids, second ed., Oxford University Press, Oxford, 1959, pp.256-261.

[8] H. Danninger, C. Gierl, M.S. Gonzalez, J. Schmidt, E. Specht, Thermal expansion and thermal conductivity of sintered steels, International Conference on Advances in Powder metallurgy & Particulate Materials, (2010) 27-30.

[9] L. Taylor, Metals Handbook 1: Properties and Selection of Metals, 8th ed., American Society for Metals, Metals Park, Ohio, (1961).