Abstract Isothermal compression has been carried out at a Thermecmaster-Z simulator. According the analysis of experimental results, the peak and steady stress significantly decreases with the increasing of the deformation temperature and the decreasing of the strain rate, and the deformation temperature would also affect the critical value of strain to reach the steady flow at the high temperature deformation of the nickel-based GH4169 superalloy. Meanwhile, a model for flow stress of the nickel-based GH4169 superalloy at high temperature deformation has been established in terms of the fuzzy artificial neural network. The maximum difference between the calculated and the experimental results is 10.18%, the average difference is 2.11%. The calculated precision is better than those through the regression method.
[1]Hu J P,Zhuang J Y,Du J H,Deng Q,Feng D,Zhong Z Y.Acta Metall Sin,2000;36:351 (胡建平，庄景云，杜金辉，邓群，冯涤，仲增墉．金属学报，2000；36：351) [2]Zheng J M,Ma L Z,Zhuang J Y,Deng Q,Du J H,Zhong Z Y,Zhang Z W.In:Loria E A,ed.,Sueralloys 718,625, 706 and Various Derivatives,Warrendale,PA:The Min- erals,Metals and Materials Society,1997:183 [3]Zheng J M,Gao Z Y,Zhuang J Y,Zhong Z Y.Metall Mater Trans,1999;30A:2701 [4]Meyers M A,Benson D J,V(?)hringer O,Kad B K,Xue Q, Fu H-H.Mater Sci Eng,2002;A322:194 [5]Kim S I,Lee Y S,Lee D L,Yoo Y C.Mater Sci En9,2003; A355:384 [6]Walgraef D.Mater Sci Eng,2002;A322:167 [7]McQueen J,Ryan N D.Mater Sci En9,2002;A322:43 [8]Li M Q,Xiong A M.Mater Sci Technol,2002;18:212 [9]Sims C T,Stoloff N S,Hagel W C.Superalloys lI- High Temperature Materials for Aerospace and Industrial Power.New York:John Wiley & Sons Inc,1987:103 [10]Shi C X,Lu D,Rong K.40 Years of Superalloy in China. Beijing:The Chinese Publishing House of Science and Technology,1996:145 (师昌绪，陆达，荣科．中国高温合金四十年．北京：中国科学技术出版社，1996：145) [11]Chen G L.Theory of Superalloy.Beijing:Metallurgical Industries Press,1998:177 (陈国良．高温合金学．北京：冶金工业出版社，1988：177) [12]Zhang B J,Zhao G P,Jiao L Y,Xu G H,Qin H Y,Feng D.Acta Metall Sin,2005;41:351 (张北江，赵光普，焦兰英，胥国华，秦鹤勇，冯涤．金属学报，2005；41：351) [13]Ju Q,Li D G,Liu G Q.Acta Metall Sin,2006;42:218 (鞠泉，李殿国，刘国权．金属学报，2006；42：218) [14]Han Li Q.Artificial Neural Networks Theory,Design & Application—Artificial Neural Cell,Artificial Neural Net- works & Artificial Neural System.Beijing:Chemical In- dustry Press,2001:43 (韩力群．人工神经网络理论、设计及应用——人工神经细胞、人工神经网络和人工神经系统．北京：化学工业出版社，2001：43) [15]Li M Q,Ju W B,Lin Y Y,Wang X J,Niu Y.Mater Sci Technol,2007,in press
