Kinetics of Recrystallization and Grain Growth in Ti-17 Alloy
The aim of this research is to simulate the forging step in the two phase α/β-range followed by recrystallization in the β field during which micro-structure evolves. This involves the following phenomena:grain deformation,recrystallization and grain growth for the β matrix and disorienta-tion/fragmentation for the a Widmanstatten platelets. More specifically, this work analyzes the effects of a deformation in the α/β field on the subsequent β grain growth during a heat treatment at higher temperatures for a Ti-17 titanium alloy. The experimental part is based on uniaxial compression tests in order to simulate the forging step. The complete thermomechanical treatment starts with a temperature homogenization step (10min) followed by uniaxial compression with a strain rate of 10-2s-1 in the α/β-phase field and a water quenching; the samples are then subjected to a recrystallization / grain growth step at higher temperatures (in the β-phase domain). The evolution of grain structures and substructures were investigated by optical and scanning electron microscopy (SEM) and electron backscattering diffraction (EBSD). The influence of strain and heat treatments time on the microstructure is described. The kinetics of recrystallization and grain growth in the alloy have been determined.
Titanium (Ti) Ti-17 alloy dynamic recrystallization (DRX) microstructure grain growth
Mélanie Semblanet Frank Montheillet David Piot Christophe Desrayaud Adeline Bénéteau Yvon Millet
Ecole Nationale Supérieure des Mines de Saint Etienne,Laboratoire Claude Goux,CNRS UMR 5146,Centre S Ecole Nationale Supérieure des Mines de Saint Etienne,Laboratoire Claude Goux,CNRS UMR 5146,Centre S SNECMA Gennevilliers,171 boulevard de Valmy,BP 31,92702 COLOMBES CEDEX,France TIMET Savoie,62 avenue Paul Girod,73400 UGINE,France
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
573-576
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）