Dislocation structures in the γ phase grains of Ti 45Al 10Nb specimens have been characterized after tensile tests at room temperature. In addition to ordinary dislocations with b=1/2〈110], a certain density of supe...Dislocation structures in the γ phase grains of Ti 45Al 10Nb specimens have been characterized after tensile tests at room temperature. In addition to ordinary dislocations with b=1/2〈110], a certain density of superdislocations and faulted dipoles were observed, which are rarely present in the conventional two phase TiAl base alloys of normal impurity. This difference was attributed to the solution of high Nb in the γ phase, which may increase the CRSS for 〈110] ordinary slip.展开更多
文摘Dislocation structures in the γ phase grains of Ti 45Al 10Nb specimens have been characterized after tensile tests at room temperature. In addition to ordinary dislocations with b=1/2〈110], a certain density of superdislocations and faulted dipoles were observed, which are rarely present in the conventional two phase TiAl base alloys of normal impurity. This difference was attributed to the solution of high Nb in the γ phase, which may increase the CRSS for 〈110] ordinary slip.
