Jh. Abboud et al., FUNCTIONALLY GRADIENT LAYERS OF TI-AL BASED ALLOYS PRODUCED BY LASER ALLOYING AND CLADDING, Materials science and technology, 10(5), 1994, pp. 414-419
Laser surface alloying and cladding have been used with the aim of pro
ducing functionally gradient materials based on the Ti-Al system. A co
ntinuous powder feed into a laser generated melt pool produced several
fully overlapping layers of increasing Al content. Alloying involved
feeding powdered Al onto a near-alpha Ti alloy substrate. For cladding
, powder mixtures of Al and Ti-6Al-4V (wt-%) alloy were used with a Ti
substrate of commercial purity. Cladding involving low dilutions prov
ides a better approach to producing several discrete layers of increas
ing Al content than does alloying which is associated with higher dilu
tions. Structural and compositional data are reported for samples cont
aining up to four layers having Al contents of up to approximately 34.
5 wt-% (48 at.-%).