Acta Metall Sin  2011, Vol. 47 Issue (12): 1591-1599    DOI: 10.3724/SP.J.1037.2011.00523

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MICROSTRUCTURE CONTROL AND PREDICTION OF GH738 SUPERALLOY DURING HOT DEFORMATION II. Verification and Application of Microstructural Evolution Model

YAO Zhihao, WANG Qiuyu, ZHANG Maicang, DONG Jianxin

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083

YAO Zhihao WANG Qiuyu ZHANG Maicang DONG Jianxin. MICROSTRUCTURE CONTROL AND PREDICTION OF GH738 SUPERALLOY DURING HOT DEFORMATION
II. Verification and Application of Microstructural Evolution Model. Acta Metall Sin, 2011, 47(12): 1591-1599.

Abstract References Related Articles Recommended Metrics Download:  PDF(1836KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Microstructure evolution models of dynamic recrystallization, meta–dynamic recrystallization, static recrystallization and grain growth behavior for GH738 superalloy were implanted into finite element software MSC. SUPERFORM with FORTRAN language by means of the user subroutines, in order to add the function of predicting microstructure evolution during hot forging to MSC. SUPERFORM. Microstructure evolution models of GH738 superalloy and the feasibility of the redeveloped MSC.SUPERFORM were verified by comparison between the simulated and experimental results on hot compression specimens and dia.250 mm turbine disc. The numerical simulation of the dia.1250 mm turbine disc forging was carried out by the redeveloped MSC.SUPERFORM, showing that hot working window was in temperature range of 1040—1100  ℃, strain rate range of 10—25 mm/s. Comparison between simulated and actual forging results in the condition of 1080  ℃, 10 mm/s showed that the simulated microstructure was in good agreement with the actual result. Besides, the numerical simulation of the dia.1400 mm turbine disk forging was also carried out by the redeveloped MSC.SUPERFORM. Therefore, the construction of microstructure evolution models of GH738 superalloy and the feasibility of the redeveloped MSC.SUPERFORM are of great significance to accurate control and prediction of turbine disc microstructure. Key words:  GH738 wrought nickel base superalloy      turbine disc      secondary development      microstructure evolution      numerical simulation      Received:  11 August 2011      Fund:  Supported by National Natural Science Foundation of China (No.51071017) Service E-mail this article Add to citation manager E-mail Alert RSS Collect articles（0） Articles by authors YAO Zhi-Gao YU Qiu-Yu ZHANG Mai-Cang DONG Jian-Xin URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00523     OR     https://www.ams.org.cn/EN/Y2011/V47/I12/1591 [1] Kermanpur A, Tin S, Lee P D, Mclean M. JOM, 2004; 56:72 [2] Tabb T P, Kantzos P T, Telesman J, Gayda J, Sudbrack C K, Palsa B. Acta Mater, 2011; 33: 414 [3] Shi C X, Zhong Z Y. Acta Metall Sin, 2010; 46: 1281 (师昌绪, 仲增墉. 金属学报, 2010; 46: 1281) [4] Guimaraes A A, Jonas J J. Metall Trans, 1981; A12: 1655 [5] Weaver D S, Semiatin S L. Scr Mater, 2007; 57: 1044 [6] Sellars C M, Whiteman J A. Mater Sci, 1979; 3: 187 [7] Feng J P, Luo Z J. 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