On the Relation between Microstructure, Texture and Tensile Deformation Behavior of Ti3A12. 5V Alloy at Room Temperature
Microstructural and textural characterization of Ti 3A1 2. 5V alloy sheet is carried out by Electron BackScatter Diffraction and X-ray diffraction pole figure measurement. The partially recrystallized material is tensile tested in the transverse direction in order to understand the relationships governing the tensile deformation behavior of this alloy. Particularly, the influence of microstructure and crystallographic texture on strain localization and yield point phenomena is analyzed. All the stress-strain curves of the transverse direction tested sheets show a stress drop immediately after yielding, which is followed by premature necking and a ductile fracture at around 20％ true strain. Thermal measurements performed during the tensile test show that strain localization occurs early in the tensile test causing necking and rupture without strain hardening. These results suggest that the premature strain localization leading to rupture,combined with the strong anisotropy caused by crystallographic texture can explain the anomalous plastic behavior, while the low dislocation density in recrystallized grains may explain the occurrence of yield point phenomena.
Recrystallization Crystallographic Texture Electron backscatter diffraction (EBSD) titanium alloy (Ti) yield point phenomena
Nicolas Bayona-Carrillo Nathalie Bozzolo Christophe Schuman Jean-Jacques Funden-berger Francis Wagner
Laboratoire d etude des microstructures et de mecanique des materiaux, LEM3-UMR 7239 , Ile du Saulc MINESParisTech ,CEMEF-Centre de Mise en Forme des Materiaux,CNRS UMR 7635,BP 207 1 rue Claude Daunes Laboratoire d etude des microstructures et de mecanique des materiaux, LEM3-UMR 7239 , Ile du Saulc
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1277-1280
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）