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)
材料科学技术（英）
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
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