Transactions of Materials and Heat Treatment

Title：Numerical simulation and analysis on grain size evolution during the hot die forging for alloy GH4169 turbine disk

Authors： Zhang Haiyan Cheng Ming Zhao Zhong Zhang Shihong

Unit： Ningbo University of Technology Chinese Academy of Sciences

KeyWords： alloy GH4169 turbine disk hot die forging grain size numerical simulation

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2017,42(11):1-5

Abstract：

For the microstructure defects of coarse grain and duplex grain always appearing during the hot die forging for alloy GH4169 turbine disk, its microstructure evolution during hot deformation and subsequent heat treatment were studied by the hot compression tests and heat treatment tests after hot deformation, and the grain size evolution models of alloy were established. The results indicate that the main evolution mechanism of alloy GH4169 during hot deformation is dynamic recrystallization, and the main evolution mechanism during heat treatment after hot deformation is grain growth and twins formation. At last, the grain size evolution of alloy GH4169 turbine disk during the hot die forging is predicted by combining grain size evolution model with finite element method, and the predicted results are in good agreement with the observation results.

Funds：

国家自然科学基金资助项目（51505240）；浙江省自然科学基金资助项目（LY15E050008）；宁波市自然科学基金资助项目（2015A610068）

作者简介：张海燕（1981-），女，博士，副教授 E-mail：zhang-hai-yan@hotmail.comGH4169

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