Abstract
In the present study, various kinds of in-situ reinforcements were introduced into Ti-V-Al shape memory alloys to enhance strength. The results revealed that the addition of TiB2 and B4C ceramic particles can form TiB whiskers and a mixture of TiB whiskers and TiC particles, respectively. Meanwhile, both TiB2 and B4C ceramic particles can refine grain size of Ti-V-Al shape memory alloys. The addition of TiB2 and B4C ceramic particles caused an increase in martensitic transformation temperature. The grain refinement and introduction of in-situ TiB whisker and TiC particles resulted in an obvious improvement in strength without sacrificing the strain recovery characteristics. For comparison, the addition of B4C ceramic particles can obtain high-performance Ti-V-Al shape memory alloys.
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