Abstract
A new type of Ti-18.4 Nb-1.4Zr-0.3Ta-4.3 O exhibiting near-linear deformation behavior was created to elucidate the core principles behind its near-linear deformation behavior in quasi-Gum Metals. The in situ simultaneous X-ray diffraction study shows that a β→α″ stress-induced martensitic transformation (SIMT) persists and covers a large stress range under the near-linear deformation of Ti-18.4 Nb-1.4Zr-0.3Ta-4.3 O. Within the SIMT process, the variant 5 of α″ martensite usually forms more readily as it can output the maximum phase transformation strains compared to the other equivalent variants. The experimental results indicate that near-linear deformability of quasi-Gum Metal is due to the combined influence of its inherent deformation (including elastic and trace plastic) together with a SIMT that operates over a large strain range. These findings have helped to develop a more comprehensive view of the principle behind the near-linear deformation in quasi-Gum Metals and Gum Metal.
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