Abstract
The effect of (α+β)-quenching (water-quenching from 993K after β-quenching) on the static tensile properties of sintered Ti-Co binary alloys was investigated in relation to the additional amount of Co.
The remarkable improvement of the static tensile properties of sintered Ti-Co binary alloys containing less than 5%Co was obtained by the (α+β)-quenching. For example, the tensile strength and the elongation of the (α+β)-quenched Ti-5%Co specimen were 1100 MPa and 10%, respectively. However, the (α+β)-quenched specimen containing more than 6%Co showed the abrupt decrement of elongation due to the precipitation of fine particles along grain boundaries.
