Microstructure Transformation of a Refined High Nb Containing TiAl Alloy

摘要：

　　High Nb containing TiAl alloys have been investigated traditionally as potential high temperature structural materials because of their high strength,good oxidation and creep resistance.However,the poor ductility and fracture toughness at room temperature limit their application,which could be improved by controlling microstructure to get refine and homogeneous fully lamellar structure.In this study,a high Nb containing TiAl alloy alloying Mn,B and Y with refined microstructure was produced.The solidification path was analyzed by DSC and SEM microstructure of the alloy was observed,after heating at a certain temperature for 1-24hrs and then quenching in water.The dissolution of β phase was also investigated.The results showed that the β phase could decompose only by heating in single β or near α phase field.

关键词： High Nb-TiAl alloy Heat treatment Microstructural transformation Dissolution of β phase

作者: Lihua Chai Liang Yang Jianpeng Zhang Zhiyong Zhang Laiqi Zhang Junpin Lin

作者单位: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

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: 38-43

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）