Microstructural Evolutions of a High Temperature Titanium Alloy Processed by Thermal Mechanical Treatments
TG6 alloy is a new titanium alloy which has been designed to reach the service temperature of 600℃.The microstructural evolutions of TG6 alloy under different thermal mechanical treatments were studied.It was found that lamellar microstructures with basketweave α lamella are obtained for TG6 alloy forged in β field.The evolution mechanism is transformed from dynamic recrystallization to dynamic recovery and the thickness of α lamella increases with increasing forging temperature.The aspect ratio of α lamella decreases firstly and then increases with increasing deformation degree.Grain boundary α lath appears when the deformation degree is less than 40%.The thermal mechanical treatments,including deformation in β field firstly and then deformation in α+β field result in the transformations of the microstructures drastically.The deformation degree in α+β field decides the final microstructure.The deformation degree of 20% in α+β field results in partial globular α phase.
TG6 titanium alloy Thermal mechanical treatment Microstructure Deformation mechanism
Tao Wang Hongzhen Guo Zekun Yao Zhanglong Zhao Shuhong Fu Yong Zhang
Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institu School of Material Science and Engineering, Northwestern Polytechnical University, Xian 710072,PR C
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
860-865
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）