Title
Design and Fabrication of Functionally Graded Material from Ti to γ-TiAl by Laser Metal Deposition
Abstract
Functionally graded material (FGM) is one kind of advanced material characterized by a gradual change in properties as the position varies. The spatial variation of compositional and microstructure over volume is aimed to control corresponding functional properties. In this research, when 100% γ-TiAl was directly deposited on pure Ti substrate, cracks were formed within the γ-TiAl layer. Then a six-layer crack-free functionally graded material of Ti/TiAl was designed and fabricated by laser metal deposition (LMD) method, with composition changing from pure Ti on one side to 100% γ-TiAl on the other side. The fabricated FGM was characterized for material properties by a variety of techniques. The chemical compositions, microstructure, phases, and hardness of the composite were characterized by Scanning Electronic Microscope (SEM), Optical Microscope (OM), Energy Dispersive X-ray Spectroscopy (EDS), and hardness testing. The microstructure and chemical compositions in different layers were studied.
Recommended Citation
X. Chen et al., "Design and Fabrication of Functionally Graded Material from Ti to γ-TiAl by Laser Metal Deposition," Proceedings of the 28th Solid Freeform Fabrication Symposium (2017, Austin, TX), pp. 148-159, University of Texas at Austin -- Laboratory for Freeform Fabrication (LFF), Aug 2017.
Meeting Name
28th Annual International Solid Freeform Fabrication Symposium (2017: Aug. 7-9, Austin, TX)
Department(s)
Materials Science and Engineering
Second Department
Mechanical and Aerospace Engineering
International Standard Serial Number (ISSN)
1053-2153
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2017 University of Texas at Austin -- Laboratory for Freeform Fabrication (LFF), All rights reserved.
Publication Date
09 Aug 2017