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Microstructure of Superplastical Deformation of Hotrolled TiAl Intermetallic Compound

Zhang Di, Qin Jining, Shi Xinghua, Zhang Guoding(Shanghai Jiao Tong University, Shanghai 200030)  
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
【Fund】: 国家自然科学基金
【CateGory Index】: TG146,TG146
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