Microstructure and Deformation Micromechanisms of a β-metastable Titanium alloy Determined by Conventional and in-situ Straining TEM
Our work is aimed at characterizing the different micro-mechanisms that,in the complex microstructure of the β-metastable Ti-17 alloy,contribute to the large yield stress of this category of alloy. In the present paper, we have focussed on the structural hardening due to the interaction of dislocations with localized obstacles (i. e nanoparticles) in the αp platelets embedded in the β matrix. Post-mortem as well as in-situ straining Transmission Electron Microscope (TEM) experiments have been performed on this material and the interactions between the dislocations and the nano-scaled obstacles have been recorded directly, during the motion of the dislocations. From a statistical measurement of the distribution of pinning points on the dislocation lines,the contribution of these nano-obstacles to the yield stress of the αp phase has been quantified and is discussed.
Titanium β-metastable in situ straining TEM dislocations
Nicolas Escale Jo(e)l Douin Florence Pettinari-Sturmel Christophe Daffos Armand Coujou
CEMES/CNRS,29,rue Jeanne Marvig,BP 94347,31055 Toulouse Cedex 4,France Aubert & Duval,75,boulevardde CEMES/CNRS,29,rue Jeanne Marvig,BP 94347,31055 Toulouse Cedex 4,France Aubert & Duval,75,boulevardde la liberation,BP 173,09102 Pamiers Cedex,France
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
446-449
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）