【摘要】 研究了热轧态ＴｉＡｌ基金属间化合物超塑性变形的可行性，研究结果表明，在Ｔ＝１０００℃～１１００℃，ε．＝１×１０－４ｓ－１～１×１０－３ｓ－１实验条件下，热轧态ＴｉＡｌ基金属间化合物呈现超塑性变形，在Ｔ＝１１００℃，ε．＝５×１０－４ｓ－１其最大延伸量可达３４０％。热轧态ＴｉＡｌ基金属间化合物在超塑性变形过程中，其应力应变敏感指数ｍ随超塑性变形时的延伸率变化而变化，其值为０．４０～０．７０。光学及电子显微镜分析表明，热轧态ＴｉＡｌ基金属间化合物的超塑性表现机制与ＴｉＡｌ基金属间化合物在变形过程中的动态再结晶有关。更多还原

【Abstract】 The superplastic deformation of the TiAl intermetallic compound has been investigated It is shown that under hot roling TiAl exhibits superplastic deformation at T=1100℃ and ε.=5×10-4s-1, and its maximum elongation is 340% The strain rate sensitive exponent changes within the range of 04～07 during the superplastic flow Analysis by optical microscopy and transmission electron microscopy show that the superplastic mechanism under hot rolling is dynamic recrystallization更多还原