Enhancement of tensile properties of Ti2AlNb alloy added with Ta element

Nb was replaced partially by Ta in Ti2AlNb alloy, resulting in elevated tensile strengths at high temperatures. The yield and tensile strength are up to 985 MPa and 1080 MPa at 650 degrees C, respectively. Meanwhile, the elongation maintained a high level and the value reached 13 %. The microstructure and deformation mechanism at high temperatures were investigated. The results revealed that the Ta addition improved the tensile properties by solution strengthening. Our findings provided new insights into designing the Ti2AlNb alloy with high strength and toughness.

Automated summary

Replacing Nb partially with Ta in Ti2AlNb alloy leads to elevated tensile strengths at high temperatures while maintaining high elongation. The addition of Ta improves tensile properties through solution strengthening.