Abstract
In the present investigation, the effect of the volume fraction of B4C ceramic particles on the microstructure, martensitic transformation, mechanical properties and strain recovery characteristics of Ti-V-Al shape memory alloy composites was explored. The results revealed that the addition of B4C ceramic particles resulted in the formation of in-situ TiB whiskers and TiC particles as well as grain refinement. Based on the introduction of in-situ reinforcement and grain refinement, the martensitic transformation temperature of Ti-V-Al shape memory alloy composites gradually increased, as the B4C ceramic particle content increased from 0.5 vol.% to 10.0 vol.%. In summary, a lightweight Ti-V-Al shape memory alloy composite with high performance, including a higher martensitic transformation temperature, improved thermal cycling stability, higher strength and larger elastic modulus, can be obtained by adjusting the volume fraction of B4C ceramic particles.
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