Author/Authors :
Qin، نويسنده , , G.W and Wulff، نويسنده , , L and Oikawa، نويسنده , , Tamio Ikeshoji، نويسنده , , T and Sumi، نويسنده , , S and Zhao، نويسنده , , G and Jiang، نويسنده , , M and Mao، نويسنده , , D.W and Ma، نويسنده , , J.L and Hao، نويسنده , , S.M، نويسنده ,
Abstract :
The thermal stability of the as-cast lamellar structure of the Ti–48Al, Ti–45Al–3Ga, Ti–45Al–2Nb–2Cr, Ti–46Al and Ti–46Al–1.0Si alloys (in at.%) at 1150 and 1000°C was studied by optical microscopy. The addition of 1.0Si has been demonstrated to have a remarkable improvement on the thermal stability of the lamellar structure of TiAl alloy at high temperatures, but the precise mechanism for this improvement needs to be clarified.
Keywords :
B. Thermal stability , A. Titanium aluminides , based on TiAl , Structure , D. Grain boundaries , B. Precipitates , D. Microstructure
