Microstructure and Properties of As-cast Ti-6Al-4V Alloy Via Trace Boron Addition

摘要：

　　Microstructure and properties of as -cast Ti-6Al-4V ahoy via trace boron addition have been studied.The results show that Tlib phase form in the original β grain boundaries of Ti-6Al 4V ahoy with 0.1% boron addition.Compared with boron-free Ti-6Ai-4V ahoy, boron modified al loy has refined and uniform β grains.In addition, boron addition results in an improved strength as well as ductility.The fracture mechanism of Ti6Al-4V ahoy is that: dislocation slip and pile up in the alpha colonies results in stress concentration and then voids get growing until cracks nucleate.How ever, the fracture of the boron added Ti-6Al-4V ahoy is that: stress concentration occurs around the TiB phase and then micro-voids form.TiB phase breaks and be separated with the matrix and then cracks nucleate.

关键词： titanium ahoy as-cast micro structure properties boron addition

作者: Yang Yu Chenglin Li Wenjun Ye Songxiao Hui

作者单位: State Key Lab of Nonferrous Metals & Processes,General Research Institute for Nonferrous Metals,Beijing,100088,China

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 304-308

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）