Hot Deformation Behavior of a Ni-Fe-Cr Based Superalloy for Advanced Ultra-supercritical Coal-fired Power Plants Application
HAN Liqing1, WU Yunsheng2,3, LIU Zhuang2, QIN Xuezhi2, WANG Changshuai2, ZHOU Lanzhang2, YU Hong1, CHEN Yajun4
1 China Institute of Atomic Energy, Beijing 102413, China; 2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 3 School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China; 4 Department of Customer Development, Minmetals Development Co., LTD., Beijing 100044, China
Abstract: The deformation behavior of a Ni-Fe-Cr based superalloy for 700 ℃ advanced ultra-supercritical (A-USC) power plant application was studied by the isothermal compression test at temperature range of 900—1 200 ℃ with strain rates of 0.01—10 s-1 on a Gleeble-1500 thermo-mechanical simulator. The results showed that the flow stress increased with the decreasing temperature and the increasing strain rate. The fraction of dynamic recrystallization decreased with the decreasing temperature and the increasing strain rate. However, when the strain rate was higher than 1 s-1, the fraction of dynamic recrystallization rose with the increasing strain rate due to the effect of adiabatic heating. The reasonable deformation temperature range of the alloy was 1 100—1 200 ℃, and the strain rate range was 0.01—0.3 s-1. The nucleation mechanism of dynamic recrystallization in the alloy was discontinuous dynamic recrystallization due to the existence of original grain boundaries bulging at high temperature and low strain rate. However, the dominant nucleation mechanism of dynamic recrystallization at low temperature and high strain rate turned into continuous dynamic recrystallization featured by sub-grains development within the original grains.
1 Bugge J, Kjær S, Blum R. Energy, 2006, 31 (10-11), 1437. 2 Viswanathan R, Bakker W. Journal of Materials Engineering and Performance, 2001, 10 (1), 81. 3 Patel S J, Baker B A, Gollihue R D. Procedia Engineering, 2013, 55, 246. 4 Lin F S, Xie X S, Zhao S Q, et al. Journal of Chinese Society of Power Engineering, 2011 (12), 960 (in Chinese). 林富生,谢锡善,赵双群,等.动力工程学报, 2011 (12), 960. 5 Jablonski P D, Hawk J A, Cowen C J, et al. JOM, 2012, 64 (2), 271. 6 Guo J T, Du X K. Acta Metallurgica Sinica, 2005, 41 (11), 1221. 7 Park N K, Kim I S, Na Y S, et al. Journal of Materials Processing Technology, 2001, 111 (1-3), 98. 8 Kong Y, Chang P, Li Q, et al. Journal of Alloys and Compounds, 2015, 622, 738. 9 Wang Y, Wang J, Dong J, et al. Journal of Materials Science & Techno-logy, 2018, 34, 2439. 10 Semiatin S L, Weaver D S, Kramb R C, et al. Metallurgical and Mate-rials Transactions A, 2004, 35, 679. 11 Liu Y, Hu R, Li J, et al. Materials Science and Engineering: A, 2009, 508, 141. 12 Pu E, Zheng W, Song Z, et al. Journal of Alloys and Compounds, 2017, 694, 617. 13 Wu Y, Liu Y, Li C, et al. Journal of Alloys and Compounds, 2017, 712, 687. 14 Wu Y, Liu Z, Qin X, et al.Journal of Alloys and Compounds, 2019, 795, 370. 15 Raj R. Metallurgical Transactions A, 1981, 12 (6), 1089. 16 Prasad Y, Gegel H L, Doraivelu S M, et al. Metallurgical Transactions A, 1984, 15 (10), 1883. 17 Momeni A, Dehghani K. Materials Science and Engineering: A, 2010, 527 (21), 5467. 18 Cram D G, Fang X, Zurob H S, et al. Acta Materialia, 2012, 60 (18), 6390. 19 Kumar S S S, Raghu T, Bhattacharjee P P, et al. Journal of Materials Science, 2015, 50 (19), 6444. 20 Nithin B, Chattopadhyay K, Phanikumar G. Metallurgical and Materials Transactions A, 2018, 49 (10), 4895. 21 Sui F L, Xu L X, Chen L Q, et al. Journal of Materials Processing Technology, 2011, 211, 433. 22 Rollett A, Humphreys F J, Rohrer G S, et al. Recrystallization and rela-ted annealing phenomena, Elsevier, Amsterdam, 2004. 23 Frommert M, Gottstein G. Materials Science and Engineering: A, 2009, 506 (1), 101.
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2020, Vol. 34 
