Alternative Title
The Microstructure, Hardness and Stiffness Study of Functionally Graded Materials Ti6Al4V/TiC by Laser Metal Deposition
Abstract
Crack free functionally graded material (FGM) Ti6Al4V-TiC has been fabricated by laser metal deposition (LMD) using TiC and Ti6Al4V powder which were premixed for different ratios. This study focuses on the influence of laser processing parameters and TiC compositional distribution on microstructure, Vickers hardness and phase. The microstructure is analyzed by scanning electron microscopy (SEM), x-ray diffraction (XRD) and hardness tests. Primary carbide, eutectic carbide and unmelted carbide are found in the deposit area. When laser power increased, the primary and secondary dendrite arm spacing increased. The laser power and scanning speed did not influence the Vickers hardness distribution significantly.
Recommended Citation
J. Zhang et al., "A Microstructure and Hardness Study of Functionally Graded Materials Ti6Al4V/TiC by Laser Metal Deposition," Proceedings of the 26th Annual International Solid Freeform Fabrication Symposium (2015, Austin, TX), pp. 664 - 673, University of Texas at Austin, Aug 2015.
Meeting Name
26th Annual International Solid Freeform Fabrication Symposium -- An Additive Manufacturing Conference, SFF 2015 (2015: Aug. 10-12, Austin, TX)
Department(s)
Materials Science and Engineering
Second Department
Mechanical and Aerospace Engineering
Document Type
Article - Conference proceedings
Document Version
Final Version
File Type
text
Language(s)
English
Publication Date
12 Aug 2015
Comments
This work was funded through NASA’s EPSCoR Grant #NNX13AM99A. We appreciate the NASA support.