摘要
高Nb-TiAl合金具有比传统TiAl合金更优异的力学性能,但铸态、热加工态及服役温度的热暴露组织中含有硬脆的ω相,不利于高Nb-TiAl合金力学性能的提高,限制了高Nb-TiAl合金的工程化应用。综述了高Nb-TiAl合金中ω相的最新研究进展,从ω相的形成机理、组织形态、对力学性能的影响以及ω相消除等方面对高Nb-TiAl合金中的ω相进行讨论。
High Nb containing Ti Al based alloy has more excellent mechanical properties than traditional Ti Al based alloy,but ω phase which is a hard and brittle phase in as-cast,as-worked and thermal exposed high Nb containing Ti Al based alloy in the range of service temperature is bad for the improvement of mechanical properties and limits the further application of high Nb containing Ti Al based alloy.In the present paper,the progress in research on ω phase in high Nb containing Ti Al based alloy is summarized.Mechanism of ω phase formation,microstructure morphology,the effect on mechanical properties and elimination of ω phase in high Nb containing based alloy are discussed.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第7期1903-1909,共7页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51074058)
北京科技大学新材料国家重点实验室基金(2013-ZD06)
太原理工大学校基金-青年团队基金(2013T004)
关键词
高Nb-TiAl合金
Ω相
显微组织
力学性能
high Nb containing TiAl based alloy
ω phase
microstructure
mechanical properties
