Journal
RARE METALS
Volume 31, Issue 4, Pages 318-322Publisher
NONFERROUS METALS SOC CHINA
DOI: 10.1007/s12598-012-0512-9
Keywords
titanium alloys; metastable phases; martensitic phase transformation; deformation
Funding
- National High Technology Research and Development Program of China [2011AA030101]
- State Key Laboratory for Mechanical Behavior of Materials [201011007]
- Key Science and Technology Special Project of Shaanxi Province [2009ZKC03-16]
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The plastic deformation and fracture processes of Ti-3Zr-2Sn-3Mo-25Nb alloy for surgical implants were directly observed by in situ scanning electron microscopy (SEM). The effect of phase transformations on deformation-induced martensitic transformation accompanying the cyclic tensile fracture processes was investigated. The results reveal that the metastable alpha martensites (alpha '') promotes deformation-induced martensitic transformation to ductile fracture, whereas the omega (omega) and alpha (alpha) phases drastically prevent slip dislocation and deformation-induced martensitic transformation to brittle fracture.
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