Abstract
In order to obtain the Ti-Si-B alloys with uniform and fine microstructure, the hot workability of Ti-Si-B alloys was investigated by rolling method. The influence of deformation on the microstructure and mechanical properties was studied using optical microscopy, SEM, EPMA and mechanical properties testing. Results show that the alloys exhibit good thermal plasticity from 773 to 1173 K. The deformation induced a significant refinement of microstructure of Ti-Si-B alloys. Both tensile strength and ductility were improved through rolling deformation. The elongation of Ti-0.5Si-0.2B alloy was up to 25.7% and the tensile strength is about 828 MPa when the alloy was rolled with reduction of 50% at 1173 K. Relatively lower rolling temperature can improve the microstructures and mechanical properties of the titanium alloys more effectively.
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