Evolution of Alpha→Beta Transformation in Ti-3Al-2.5V Alloy. Microstructural Changes and Properties Obtained
In Ti-3Al-2. 5V alloy, the alpha phase is gradually transformed into the beta phase until β-ransus temperature is reached,and the transformation is completed. It is important to identify the transformation kinetics to accomplish the solution heat treatments in which a phase alpha percentage remains unchanged. Kinetics and other transformation characteristics are evaluated,as well as their influence on subsequent cooling transformations, by differential and dilatometric thermal analysis. Electric conductivity measurements, hardness measurements,mechanical properties and metallographic observation,after performing controlled thermal treatments. Starting from the mill annealed condition, samples were heated at temperatures between 650℃ and 1075℃ for 1 hour, water quenched and subsequently heated 6 hours at 500℃ for aging,and air cooled Conductivity measurements on treated samples cannot be considered as representative of the produced transformations. Hardness measurements and mechanichal properties are representative of the transformation making them useful for treatment control although they cannot be used to evaluate the percentage of transformation.
Titanium alloys Ti-3Al-2.5V α phase β phase trans formation,dilatometry differential thermal analysis electrical onductivity hardness mechanical properties microstructure
Pascual Tarín Nuria Corral Antonio García Simón Jose M. Badía Nuria Martín
Departamento de Materiales y Productión Aeroespacial,E. T. S. I. Aeronáuticos,Univ. Politécnica de Madrid,28040 Madrid,Spain
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
481-484
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）