Acta Metall Sin  1998, Vol. 34 Issue (4): 356-361    DOI:

Current Issue | Archive | Adv Search |

MICROSTRUCTURE AND MICROSEGREGATION OF Ni-BASE SINGLE CRYSTAL SUPERALLOY SOLIDIFIED AT MEDIUM COOLING RATE

DU Wei; WEI Pengyi; LI Jianguo; FU Hengzhi (State Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xi'an 710072)SUN Jiahua(Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing 100081)

DU Wei; WEI Pengyi; LI Jianguo; FU Hengzhi (State Key Laboratory of Solidification Processing; Northwestern Polytechnical University; Xi'an 710072)SUN Jiahua(Central Iron and Steel Research Institute; Ministry of Metallurgical Industry; Beijing 100081). MICROSTRUCTURE AND MICROSEGREGATION OF Ni-BASE SINGLE CRYSTAL SUPERALLOY SOLIDIFIED AT MEDIUM COOLING RATE. Acta Metall Sin, 1998, 34(4): 356-361.

Abstract References Related Articles Recommended Metrics Download:  PDF(2930KB)  Export:  BibTeX | EndNote (RIS)       Abstract  With the help of high temperature-gradient directional solidification equipment (HGDS), the microstructure and microsegregation of Ni-base single crystal superalloy CMSX-2 solidified at the cooling rates from below 1 K/s to 20 K/s were investigated. The morphology of γ' precipitates and γ/γ'eutectic in the specimens were examined. The results show that, withthe increase of the cooling rate, the primary dendrite arm spacing is greatly refined to 38 μm,just as one-tenth as that by HRS processing. The microsegregation increases and then decreaseswith the increase of cooling rate. In the superfine columnar dendrite , the γ' precipitate is very fine, the amount of γ/γ' eutectic is much fewer and its' size is very small. Key words:  single crystal superalloy      microstructure      microsegregation      Received:  18 April 1998      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1998/V34/I4/356 1 Khan T.In:Bets W Brunetaud R,Coutsouradis D et al eds. High Temperature Alloys for Gas Turbine and Other Application . Dordrecht, Holland: Reider Publishing Company, 1986:21 2 胡汉起.金属凝固原理. 北京:机械工业出版社,1991:93(Hu Hanqi. Fundamentals of Solidification. Beijing: Mechanical Industry Press、 1991: 93) 3郭喜平.西北工业大学博士学位论文,1992:32(Guo Xiping. PH.D Thesis, Northwestern Polytechnical University, Xi’an,1992: 32 ) 4 Aziz M J. J Appl Phys.1982;53:1158 5 Kurz W,Giovanola B,Trivedi R.Acta Metall,、1986; 36:823 6Sarrel J A, Abbaschian G J. Metal Trans, 1986; 17A: 2063\ [1] ZHAO Peng, XIE Guang, DUAN Huichao, ZHANG Jian, DU Kui. Recrystallization During Thermo-Mechanical Fatigue of Two High-Generation Ni-Based Single Crystal Superalloys[J]. 金属学报, 2023, 59(9): 1221-1229. [2] GONG Shengkai, LIU Yuan, GENG Lilun, RU Yi, ZHAO Wenyue, PEI Yanling, LI Shusuo. Advances in the Regulation and Interfacial Behavior of Coatings/Superalloys[J]. 金属学报, 2023, 59(9): 1097-1108. [3] ZHANG Jian, WANG Li, XIE Guang, WANG Dong, SHEN Jian, LU Yuzhang, HUANG Yaqi, LI Yawei. Recent Progress in Research and Development of Nickel-Based Single Crystal Superalloys[J]. 金属学报, 2023, 59(9): 1109-1124. [4] ZHANG Leilei, CHEN Jingyang, TANG Xin, XIAO Chengbo, ZHANG Mingjun, YANG Qing. Evolution of Microstructures and Mechanical Properties of K439B Superalloy During Long-Term Aging at 800oC[J]. 金属学报, 2023, 59(9): 1253-1264. [5] LU Nannan, GUO Yimo, YANG Shulin, LIANG Jingjing, ZHOU Yizhou, SUN Xiaofeng, LI Jinguo. Formation Mechanisms of Hot Cracks in Laser Additive Repairing Single Crystal Superalloys[J]. 金属学报, 2023, 59(9): 1243-1252. [6] WANG Lei, LIU Mengya, LIU Yang, SONG Xiu, MENG Fanqiang. Research Progress on Surface Impact Strengthening Mechanisms and Application of Nickel-Based Superalloys[J]. 金属学报, 2023, 59(9): 1173-1189. [7] LI Jiarong, DONG Jianmin, HAN Mei, LIU Shizhong. Effects of Sand Blasting on Surface Integrity and High Cycle Fatigue Properties of DD6 Single Crystal Superalloy[J]. 金属学报, 2023, 59(9): 1201-1208. [8] LIU Xingjun, WEI Zhenbang, LU Yong, HAN Jiajia, SHI Rongpei, WANG Cuiping. Progress on the Diffusion Kinetics of Novel Co-based and Nb-Si-based Superalloys[J]. 金属学报, 2023, 59(8): 969-985. [9] CHEN Liqing, LI Xing, ZHAO Yang, WANG Shuai, FENG Yang. Overview of Research and Development of High-Manganese Damping Steel with Integrated Structure and Function[J]. 金属学报, 2023, 59(8): 1015-1026. [10] LI Jingren, XIE Dongsheng, ZHANG Dongdong, XIE Hongbo, PAN Hucheng, REN Yuping, QIN Gaowu. Microstructure Evolution Mechanism of New Low-Alloyed High-Strength Mg-0.2Ce-0.2Ca Alloy During Extrusion[J]. 金属学报, 2023, 59(8): 1087-1096. [11] SUN Rongrong, YAO Meiyi, WANG Haoyu, ZHANG Wenhuai, HU Lijuan, QIU Yunlong, LIN Xiaodong, XIE Yaoping, YANG Jian, DONG Jianxin, CHENG Guoguang. High-Temperature Steam Oxidation Behavior of Fe22Cr5Al3Mo-xY Alloy Under Simulated LOCA Condition[J]. 金属学报, 2023, 59(7): 915-925. [12] ZHANG Deyin, HAO Xu, JIA Baorui, WU Haoyang, QIN Mingli, QU Xuanhui. Effects of Y2O3 Content on Properties of Fe-Y2O3 Nanocomposite Powders Synthesized by a Combustion-Based Route[J]. 金属学报, 2023, 59(6): 757-766. [13] WANG Fa, JIANG He, DONG Jianxin. Evolution Behavior of Complex Precipitation Phases in Highly Alloyed GH4151 Superalloy[J]. 金属学报, 2023, 59(6): 787-796. [14] GUO Fu, DU Yihui, JI Xiaoliang, WANG Yishu. Recent Progress on Thermo-Mechanical Reliability of Sn-Based Alloys and Composite Solder for Microelectronic Interconnection[J]. 金属学报, 2023, 59(6): 744-756. [15] WU Dongjiang, LIU Dehua, ZHANG Ziao, ZHANG Yilun, NIU Fangyong, MA Guangyi. Microstructure and Mechanical Properties of 2024 Aluminum Alloy Prepared by Wire Arc Additive Manufacturing[J]. 金属学报, 2023, 59(6): 767-776. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed