Titanium is characterized by poor resistance against oxidation at high temperature. Surface modification by formation of titanium aluminide coatings would be effective to improve oxidation resistance. In this study, a 100 μm aluminum foil was initially bonded with a 1 mm Ti sheet by means of cold roll bonding. The aluminum clad Ti foil was heat treated over the temperature range 600-1000°C in order to form an outer TiAl3 layer protecting the substrate from high temperature oxidation. Al and Ti concentration profiles, as well as microhardness profiles, were determined in order to investigate the relationship between heat treatment conditions and formation of intermetallic compounds. The morphology and the structure of TiAl3 layer formed at different temperatures were studied by means of SEM/EDS and X-ray diffraction.
Cold roll bonding and annealing process to produce an intermetallic layer on Ti substrate / Pilone, Daniela; Felli, Ferdinando. - STAMPA. - 1:(2008), pp. 305-310. (Intervento presentato al convegno TMS 2008 Annual Meeting Supplemental: Materials Processing and Properties tenutosi a New Orleans, LA nel 9 March 2008 through 13 March 2008).
Cold roll bonding and annealing process to produce an intermetallic layer on Ti substrate
PILONE, Daniela;FELLI, Ferdinando
2008
Abstract
Titanium is characterized by poor resistance against oxidation at high temperature. Surface modification by formation of titanium aluminide coatings would be effective to improve oxidation resistance. In this study, a 100 μm aluminum foil was initially bonded with a 1 mm Ti sheet by means of cold roll bonding. The aluminum clad Ti foil was heat treated over the temperature range 600-1000°C in order to form an outer TiAl3 layer protecting the substrate from high temperature oxidation. Al and Ti concentration profiles, as well as microhardness profiles, were determined in order to investigate the relationship between heat treatment conditions and formation of intermetallic compounds. The morphology and the structure of TiAl3 layer formed at different temperatures were studied by means of SEM/EDS and X-ray diffraction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
