Transactions of Materials and Heat Treatment

Title：Prediction model for microstructure evolution of Ti-46.5Al-2.5V-1.0Cr-0.3Ni alloy during cogging

Authors： SI Jia-yong GAO Fan ZHANG Ji

Unit： Central South University of Forestry & Technology Central Iron and Steel Research

KeyWords： TiAl alloy cogging dynamic recrystallization prediction model for microstructure evolution

ClassificationCode：TG376.2

year,vol(issue):pagenumber：2011,36(5):137-143

Abstract：

The microstructure evolution process of cast Ti-46.5Al-2.5V-1.0Cr-0.3Ni alloy during cogging process in the temperature range of 10001200 ℃ and strain rate range of 0.0011.0 s-1 was studied by hot compressing testing on a Gleeble1500 simulator. And the characteristic of deformed microstructure with different technological parameters was studied and quantized by quantitative metallography method. Based on the experimental results, the model of dynamic recrystallization volume fraction and dynamic recrystallization grain size were set up in order to predict microstructure and grain size of cast TiAl alloy during cogging process.

Funds：

863国家高技术研究发展计划（2006AA03A204)；中南林业科技大学青年科学研究基金重点资助项目（QJ2010001A）

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