J Mater Sci Technol ›› 1994, Vol. 10 ›› Issue (2): 79-91.

• Articles •     Next Articles

Effects of Microstructure on the Tensile, Fracture Toughness and Fatigue Behaviour of Gamma Titanium Aluminides

Young- Won (Y-W.) Kim(UES, Inc., Materials Research Division, 4401 Dayton-Xenia Rd., Dayton, OH 45432, USA)(Paper presented at the International Workshop on OrderedIntermetallics 1992, Hangzhou, China)   

  • Received:1994-03-28 Revised:1994-03-28 Online:1994-03-28 Published:2009-10-10

Abstract: The effects of microstructure on the deformation and fracture behaviour of two-phase TiAl alloys were investjgated under monotonic and cyclical loading conditions, over a range of temperatu res.The tensile behaviour is analyzed for deformation temperatures between RT and 950℃, Fracture resistance behaviour and toughening mechanisms at RT and 800℃ are analyzed. and the inverse relationship botween ductility and toughness is explained using the crack initiation toughness. The preliminary results of load-controlled fatigue behaviour at 800℃ are interpreted using the tensile behaviour because deformation structure and fracture modes are similar under these two loading conditions