EFFECT OF CARBON AND OXYGEN ADDITIONS ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Ti-4.3Fe-7.1Cr-3Al ALLOY
(0) The effects of carbon and oxygen additions on the microstructure and mechanical properties of a new type low-cost beta titanium alloy Ti-4.3Fe-7.1Cr-3Al have been studied. The results showed that with the carbon addition the grain size was refined significantly, followed by the tensile strength increase and ductility improvement. At 0.2 wt.％ carbon addition the 0.2％YS increased by 22％ and elongation increased to a peak value of 23％. Also with the carbon addition the oxygen content in the alloy could be allowed to reach 0.2wt.％ without tensile property decrease. After ageing treatment, it was found that ageing temperature other than carbon content played a key role on the a-phase precipitation and ageing hardness. The hot-rolling deformation accelerated the ageing response. The optimal ageing process was decided to be 500℃ for 1h under the pretreatment of 850℃ hot-rolling followed by immediately water quenching. The reasons for these improvements were discussed in terms of the carbide pinning and a-phase precipitation.
Titanium alloys carbon addition microstructure mechanical properties
XIPING SONG LONG CHEN KUN LI GUOLIANG CHEN
The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, Peoples Republic of China
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
814-820
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）