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The microstructure and compressive properties of Ti_(500Al_(48)Mn_2and Ti_(50)Al_(48)Cr_2 alloys are studied in this paper Existence of αx+y transforntation in TiAl alloys is confirnted by metallographic examincttion,the transformation temperatuses of Ti_(50)Al_(48)Mn_2 and Ti_(500Al_(48)Cr_2,are 1375and 1373C respeclively,After treating withic x+y phase field,themicrostructure of alloys consists of lamellar zones(L)and bulk y_p.,The vohme ratio of L/y_p inctrases with increasing solution treatnient temperature.The third alloying ele-ments of Mn and Cr distribute perfentially over αphase at solution treatment tempera-tures and result in that α_2 and γ lamellae become thicker.The yield strength of Ti_(50)Al_(48)Mn_2 and Ti_(500Al_(48)Cr_2 alloys decreases and the compressibllity increases with in-creasing γ_p volume fraction.
The microstructure and compressive properties of Ti_ (500Al_ (48) Mn_2and Ti_ (50) Al_ (48) Cr_2 alloys are studied in this paper Existence of αx + y transforntation in TiAl alloys is confirmed by metallographic examincttion, the transformation temperatuses of Ti_ (50) ) Al_ (48) Mn_2 and Ti_ (500Al_ (48) Cr_2, are 1375 and 1373C respeclively, after treating with x + y phase field, their microstructure of alloys consists of lamellar zones (L) and bulk y_p., The vohme ratio of L / y_p inctrases with increasing solution treatment temperature of the third alloying ele-ments of Mn and Cr distribute perfentially over αphase at solution treatment tempera-tures and result in that α_2 and γ lamellae become thicker. The yield strength of Ti_ (50) Al_ (48) ) Mn_2 and Ti_ (500Al_ (48) Cr_2 alloys decrease and the compressibllity increases with in-creasing γ_p volume fraction.