The evolution of microstructure on aging of an （α＋β） titanium alloy （Ti-5A1-5Mo-5V-1Cr-1Fe） in the β and （α＋β） solution-treated and quenched conditions was investigated, The presence of very fine to phase...The evolution of microstructure on aging of an （α＋β） titanium alloy （Ti-5A1-5Mo-5V-1Cr-1Fe） in the β and （α＋β） solution-treated and quenched conditions was investigated, The presence of very fine to phase was detected by electron diffraction for samples aged below 400 ℃. The fine a aggregates are uniformly formed within fl grains by nucleating at the to particles or β/ω interfaces. At higher temperature, the formation of to phase is avoided and the a lamellae are precipitated at the preferred site of grain boundary and then within the matrix. The highest hardness values are found when the alloys are aged at 450 ℃ for fl condition and 350 ℃ for （α＋β） condition.展开更多
基金Project (50634030) supported by the National Natural Science Foundation of ChinaProject (2007DS04014) supported by the Program of Science and Technology of Shandong Province,ChinaProject supported by the Open Research Fund from the State Key Laboratory of Rolling and Automation,Northeastern University, China
文摘The evolution of microstructure on aging of an （α＋β） titanium alloy （Ti-5A1-5Mo-5V-1Cr-1Fe） in the β and （α＋β） solution-treated and quenched conditions was investigated, The presence of very fine to phase was detected by electron diffraction for samples aged below 400 ℃. The fine a aggregates are uniformly formed within fl grains by nucleating at the to particles or β/ω interfaces. At higher temperature, the formation of to phase is avoided and the a lamellae are precipitated at the preferred site of grain boundary and then within the matrix. The highest hardness values are found when the alloys are aged at 450 ℃ for fl condition and 350 ℃ for （α＋β） condition.
