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安震,王琛,丁旭,谢辉,毛小南,张平祥,李金山.Ti555211合金片层组织裂纹扩展的SEM原位观察[J].稀有金属材料与工程(英文),2019,47(3):853~858.[An Zhen,Wang Chen,Ding Xv,Xie Hui,Mao Xiaonan,Zhang Pingxiang and Li Jinshan.In-situ SEM observations of tensile deformation behavior of in a newnear β titanium alloy—Ti555211 with lamellar structure[J].Rare Metal Materials and Engineering,2019,47(3):853~858.]
In-situ SEM observations of tensile deformation behavior of in a newnear β titanium alloy—Ti555211 with lamellar structure
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Received:January 09, 2018  Revised:February 23, 2018
DOI:
Key words: Ti555211 titanium alloy  lamellar structure  near β titanium  In-situ SEM observations
Foundation item:国家自然科学基金面上项目资助(项目号:51471136),高等学校学科创新引智计划 (“111” Project) (B08040)。
Author NameAffiliation
An Zhen,Wang Chen,Ding Xv,Xie Hui,Mao Xiaonan,Zhang Pingxiang and Li Jinshan  
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Abstract:
      The tensile deformation and fracture behavior of the Ti555211 alloy were investigated using in-situ SEM technology. Results showed that it was found that slip bands were given priority within the lamellar structure with the tensile loading direction for the Ti555211 alloy with initial lamellar structure. As the crack propagated, the slip bands appeared dense. Moreover, for the alloy with initial lamellar structure, the crack propagated from the corners of the indention both across and along the lamellar directions.The Ti555211 alloy with initial lamellar structure show different fracture morphologies. For the alloy with initial lamellar structure, visible shear lips and a number of dimples were observed in fracture. The deformation and fracture behavior of the near-β titanium alloy of Ti555211 can be tracked by the SEM in-situ tensile test method in real time. The results of this method are more scientific and informative.