The Phase Transformation and Microstructure Evolution during Heating of Ti2 Al-Nb-based Alloys

摘要：

In this paper, the phase transformation and microstructure evolution during heating of Ti2AlNbbased alloy have been investigated by a dilatome-try, X-ray diffraction and scanning electron microscopy. Results show that phase transformation in Ti2AlNbbased alloy during heating included four stages,B2+α2 →O,O→B2,O→α2 and α2→B2. Accordingly,the expansion rate is approximate to linear,and then the dilatation law was a slight increase and at last becomes a constant. With proceeding of heating from lower temperature,O lamellar immerges in B2 matrix,and then transforms to α2,and finally α2 particles diminish in B2 matrix.

关键词： Ti2AlNb-based alloy dilatometry phase transformation microstructure cheating

作者: Wei Dang Jin-shan Li Tie-bang Zhang Hong Zhong Xiang-yi Xue Rui Hu

作者单位: State Key Laboratory of Solidification Processing,Northwestern Polytechnical University ,Xian 710072,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: 1475-1477

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）