摘要
In the present paper the effects of additions of Zr and Y on the microstructure and mechanical properties for Ti-(6.0 approximately 6.5)Al-(2.0 approximately 3.0)Sn-(1.5 approximately 6.0)Zr-(0.8 approximately 1.0)Mo-1.0Nb-0.25Si alloys are reported. The experimental results shows that: with increasing of Zr content, tensile strength and creep resistance of the alloys increase, and reduction in area and thermal stability of the alloys decrease. Decrease in thermal stability of the alloys mainly caused by surface thermal unstability. After heat treatment Y addition can make grain size of the alloys refine. The reduction in area and thermal stability of the alloys with Y addition are improved, and tensile strength slightly decreases and creep resistance is essentially the same as the alloy without Y addition. These phenomena are explained in brief.
In the present paper the effects of additions of Zr and Y on the microstructure and mechanical properties for Ti-(6.0 approximately 6.5)Al-(2.0 approximately 3.0)Sn-(1.5 approximately 6.0)Zr-(0.8 approximately 1.0)Mo-1.0Nb-0.25Si alloys are reported. The experimental results shows that: with increasing of Zr content, tensile strength and creep resistance of the alloys increase, and reduction in area and thermal stability of the alloys decrease. Decrease in thermal stability of the alloys mainly caused by surface thermal unstability. After heat treatment Y addition can make grain size of the alloys refine. The reduction in area and thermal stability of the alloys with Y addition are improved, and tensile strength slightly decreases and creep resistance is essentially the same as the alloy without Y addition. These phenomena are explained in brief.
