Effect of Al on Microstructures and Properties of Ti-45Al-8.5Nb-0.2B-0.2W Alloy

摘要：

　　In the present paper,the necessity of strictly controlling Al content is demonstrated for Ti-45Al-8.5Nb-0.2B-0.2W alloy by analyzing solidification microstructure,compressive properties at room temperature and α phase transformation point of alloys containing 43-47at.%Al.The results show that the alloy has an optimal combination of mechanical properties and microstructure.Increasing Al content leads to increase in lamellar colony size and decrease in B2 phase for the solidification microstructure.Yield strength decreases linearly with Al content,but total strain increases linearly with Al content.The phase transformation temperature of β + α→α rises more than 20 oC when Al increases to 46at.%,and drops about 20 oC when Al decreases to 44at %.Therefore,Al deviation should be as small as possible in producing technical alloy to ensure the stability in terms of properties,microstructure and processing route.

关键词： High Nb containing TiAl alloy Al content Composition Mechanical property

作者: Xiangjun Xu Junpin Li Dongdong Han

作者单位: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 44-49

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）