Effect of Trace Boron on Microstructure and Mechanical Properties of Ti-9V-3Al-3Cr-3Zr-3.5Mo Alloy

摘要

The effects of trace boron on microstructure and mechanical properties of β type Ti-9V-3Al-3Cr-3Zr-3.5Mo (wt.%) alloy have been investigated in this study. Upon the addition of 0.02 wt.% boron, the grain size of the B-modified alloy was almost four times smaller than that of the B-free alloy. Accordingly, the tensile strength and elongation of B-modified alloy increased from 712 MPa and 14.6% to 813 MPa and 17.9%, respectively, mainly due to the effect of grain refinement.