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Comparative study of microstructures and mechanical properties of in situ Ti–TiB composites produced by selective laser melting, powder metallurgy, and casting technologies

Published online by Cambridge University Press:  17 June 2014

H. Attar ,
M. Bönisch ,
M. Calin ,
L.C. Zhang ,
K. Zhuravleva ,
A. Funk ,
S. Scudino ,
C. Yang  and
J. Eckert
H. Attar
Affiliation:
School of Engineering, Edith Cowan University, Joondalup, Perth, Western Australia 6027, Australia; and IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany
M. Bönisch
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany
M. Calin
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany
L.C. Zhang*
Affiliation:
School of Engineering, Edith Cowan University, Joondalup, Perth, Western Australia 6027, Australia
K. Zhuravleva
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany; and TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany
A. Funk
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany; and TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany
S. Scudino
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany
C. Yang
Affiliation:
National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China
J. Eckert
Affiliation:
IFW Dresden, Institute for Complex Materials, D-01171 Dresden, Germany; and TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany
*
a)Address all correspondence to this author. e-mail: [email protected], [email protected]
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Abstract

This study presents results of selective laser melting (SLM), powder metallurgy (PM), and casting technologies applied for producing Ti–TiB composites from Ti–TiB2 powder. Diffraction patterns and microstructural investigations reveal that chemical reaction occurred between Ti and TiB2 during all the three processes, leading to the formation of Ti–TiB composites. The ultimate compressive strength of SLM-processed and cast samples are 1421 and 1434 MPa, respectively, whereas the ultimate compressive strengths of PM-processed 25%, 29%, and 36% porous samples are 510, 414, and 310 MPa, respectively. The Young's moduli of porous composite samples are 70, 45, and 23 GPa for 25%, 29%, and 36% porosity levels, respectively, and are lower than those of SLM-processed (145 GPa) and cast (142 GPa) samples. Fracture analysis of the SLM-processed and cast samples shows shear fracture and microcracks across the samples, whereas failure of porous samples occurs due to porosities and weak bonds among particles.

Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 17: Focus Issue: The Materials Science of Additive Manufacturing , 14 September 2014 , pp. 1941 - 1950
Copyright
Copyright © Materials Research Society 2014 

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References

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