In situ scanning electron microscopy observation of deformation and fracture behavior of Ti-3Zr-2Sn-3Mo-25Nb alloy
来源期刊：Rare Metals2012年第4期
论文作者：MA Xiqun a,YU Zhentao a,HAN Yong b,SONG Xiping c,and SUN Qiaoyan b a Northwest Institute for Nonferrous Metal Research,Xi’an ,China b State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an ,China c State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing ,China
文章页码：318 - 322
摘 要：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（α″） promotes deformation-induced martensitic transformation to ductile fracture,whereas the omega（ω） and alpha（α） phases drastically prevent slip dislocation and deformation-induced martensitic transformation to brittle fracture.
MA Xiqun a,YU Zhentao a,HAN Yong b,SONG Xiping c,and SUN Qiaoyan b a Northwest Institute for Nonferrous Metal Research,Xi’an 710016,China b State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China c State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China
摘 要：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（α″） promotes deformation-induced martensitic transformation to ductile fracture,whereas the omega（ω） and alpha（α） phases drastically prevent slip dislocation and deformation-induced martensitic transformation to brittle fracture.
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