Precipitations Characteristics of Ti-60 Alloy during Long-term Aging Treatment at 600C

摘要：

During long-term aging treatment at 600℃ ,α2 phase and silicide are characterized to realize the microstrueture stability of the high temperature titanium alloy Ti-60. Sizes,distribution and crystallographic of precipitations are analyzed through TEM after aging treatment from 8 hours to 100 hours. Inside α platelets,compact α2 phase precipitates coherently,the sizes and distances of the particles increase with the aging time. The average size of the particles approximates 20 nm after 100 hours of aging. On the other hand, silicides as (Ti,Zr)6Si3 mainly precipitate along α/ α plate boundaries in addition to some dislocations. The long and short axis of the ellipsoid silicide particles are less than 80 nm and 160 nm after 100 hours of aging, respectively. Enrichment of zirconium in silicide is proved through EDS.

关键词： Near-α titanium alloy ordered α2 phase silicide long-term aging treatment microstructural stability

作者: Feng Sun Jinshan Li Hongchao Kou Bin Tang Hui Chang Jianming Cai Lian Zhou

作者单位: State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xian 710072 Beijing Institute of Aeronautical Materials,Beijing 100095,China

会议类型: 国际会议

会议名称: The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)

会议地点: 北京

会议语种:英文

页码: 609-613

在线出版日期: 2011-06-19（万方平台首次上网日期，不代表论文的发表时间）