Abstract
Ti-6Al-4V(TC4)/Ti-48Al-2Cr-2Nb(TiAl) functionally graded material (FGM) with no metallurgical defects was successfully fabricated by laser deposition melting (LDM) without preheating. Results showed that the TC4/TiAl FGM can effectively reduce the difference in thermal expansion coefficients (TEC) between TC4 and TiAl, thereby eliminating cracks, and ideal metallurgical bonds were obtained throughout the FGM. The microstructure changed from basket to lamellar as the composition transiting from TC4 to TiAl, and the phase transformation evolution is α→α+α2→α2+γ+B2. The FGM showed a quasi-cleavage fracture with the ultimate tensile strength of 308 MPa and the elongation of 1.8%, and the fracture surface was located at 100%TiAl.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
