High Temperature Creep Behavior of Mg-11Gd-2Y-1.5Ag-0.5Zr Alloy
GUAN Haikun1,2, LI Quan'an1,2, CHEN Xiaoya1, ZHANG Shuai1, WANG Songbo1
1 School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China 2 Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Luoyang 471023, China
Abstract: The creep behavior and microstructure evolution of Mg-11Gd-2Y-1.5Ag-0.5Zr alloy at 225—275 ℃/110—150 MPa were studied. The results show that the creep stress exponent n is 3.4 at 225 ℃/110—150 MPa, and the creep mechanism is dislocation slip mechanism. At 250 ℃/110—150 MPa, the creep stress exponent n is 4.7, and the creep mechanism is dislocation slip mechanism. At 275 ℃/110—130 MPa, the creep stress exponent n is 5.8, and the creep mechanism is dislocation slip mechanism. At 275 ℃/130—150 MPa, the creep stress exponent n is 10.5, the creep law of power law is invalid and the creep mechanism is complex. The results of creep activation energy Q on creep mechanism are basically consistent with the result of creep stress exponent n value. At the same temperature, the grain size increases with the increase of stress. Under the same stress, the grain size decreases with the increase of temperature. Under the high stress range of 110 MPa to 150 MPa, the alloy has good creep resistance under 250 ℃.
1 Shao J. World Nonferrous Metals,2018(19),161. 邵俊.世界有色金属,2018(19),161. 2 Tang C P, Zuo G L, Li Z Y, et al. Materials Review A: Review Papers,2018,32(11),3760. 唐昌平,左国良,李志云,等.材料导报:综述篇,2018,32(11),3760. 3 Alizadeh R, Mahmudi R, Ngan A H W, et al. Journal of Materials Science,2015,14(14),4940. 4 Dong T Y. World Nonferrous Metals,2018(19),156(in Chinese). 董天宇.世界有色金属,2018(19),156. 5 Jafari N H R, Wu G H, Liu W C. Materials Science and Engineering A,2016,651,840. 6 Sun B W. Petrochemical Industry Technology,2017,24(12),211(in Chinese). 孙博闻.石化技术,2017,24(12),211. 7 Li R G, Zhang J H, Fu G Y, et al. Materials Science and Engineering, A,2018,715,186. 8 Zhou L P, Zeng X Q, Li D J, et al. Transactions of Nonferrous Metals Society of China,2015,25(6),1409. 9 Yuan L, Shi W C, Zhong Y Q, et al. Materials Science and Engineering, A,2015,639,274. 10 Zhang Q, Li Q A, Zhang X Y, et al. Foundry,2011,60(11),1080(in Chinese). 张清,李全安,张兴渊,等.铸造,2011,60(11),1080. 11 Chen X Y, Zhang Y, Peng L M, et al. Calphad Computer Coupling of Phase Diagrams and Thermochemistry,2015,48,43. 12 Birbilis N, Rong W, Zhang Y, et al. Materials Science and Engineering A,2018,731,609. 13 Zhao Z, Wang Q D, Ding W J. Special Casting and Nonferrous Alloys,2009,29(5),477(in Chinese). 赵政,王渠东,丁文江.特种铸造及有色合金,2009,29(5),477. 14 Chen J, Wang Q D, Zhao Z, et al. Chinese High Technology Letters,2010,20(4),427(in Chinese). 陈杰,王渠东,赵政,等.高技术通讯,2010,20(4),427. 15 Zhang Y, Wu Y J, Peng LM. Journal of Alloys and Compounds,2014,615,703. 16 Guan H K, Li Q A, Chen X Y, et al. Transactions of Materials and Heat Treatment,2019,40(10),23(in Chinese). 关海昆,李全安,陈晓亚,等.材料热处理学报,2019,40(10),23. 17 Zhang L T, Zhang X B, Cui X P. Materials Review A: Review Papers,2014,28(10),91(in Chinese). 张李铁,张效宾,崔晓鹏.材料导报:综述篇,2014,28(10),91. 18 Li D S, Cheng X N. Materials Review A: Review Papers,2006,20(5),424(in Chinese). 李冬升,程晓农.材料导报:综述篇,2006,20(5),424. 19 Serebryany V N, Rokhlin L L, Monina A N. Inorganic Materials: Applied Research,2014,5(2),116. 20 Lussana D, Massazza M, Riontino G. Journal of Thermal Analysis and Calorimetry,2008,92(1),223.
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2021, Vol. 35 
