金属学报  2011, Vol. 47 Issue (1): 88-94    DOI: 10.3724/SP.J.1037.2010.00434

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真空感应熔炼Nb-16Si-22Ti-2Hf-2Cr-2Al合金的组织和性能

贾丽娜, 高明, 盖京如, 郑立静, 沙江波, 张虎

MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Nb-16Si-22Ti--2Hf--2Cr--2Al INGOT PREPARED BY VACUUM INDUCTION MELTING

JIA Lina, GAO Ming, GE Jingru, ZHENG Lijing, SHA Jiangbo, ZHANG Hu

School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191

贾丽娜 高明 盖京如 郑立静 沙江波 张虎. 真空感应熔炼Nb-16Si-22Ti-2Hf-2Cr-2Al合金的组织和性能[J]. 金属学报, 2011, 47(1): 88-94.
, , , , , . MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Nb-16Si-22Ti--2Hf--2Cr--2Al INGOT PREPARED BY VACUUM INDUCTION MELTING[J]. Acta Metall Sin, 2011, 47(1): 88-94.

摘要 参考文献 相关文章 Metrics 全文: PDF(1464 KB)   Abstract：The melt with a nominal composition of Nb-16Si-22Ti-2Hf-2Cr-2Al was poured in a ceramic shell mould with a temperature gradient of about 4℃/mm, and the ingot with the dimension of 60 mm×170 mm was obtained. The relationship between the microstructure and mechanical properties was measured, and the effects of the silicide on fracture toughness at ambient temperature and compression strength at high temperature were analyzed. It is revealed that the microstructure of the alloy consists of Nb solid solution and silicides, and the cooling rate can obviously change primary phase and constituent phases. The volume fraction of Nb3Si formed at rapid cooling rate is significantly increased, and Nb5Si3 phase is formed with decreasing in cooling rate, whereas the volume fraction of the eutectic colonies and NbSS dendrites increase evidently, especially the second dendrite arm. Fine and uniform eutectic colonies are contributed to the ambient tensile strength, while the coarse primary Nb3Si decreases the tensile strength but improves the compression strength of the alloy. When the microstructure is mainly composed of fine (NbSS+Nb5Si3) eutectic colonies, the tensile strength and elongation of the alloy reach 449 MPa and 0.3%, respectively. When lath-like Nb3Si phase has 80 $\mu$m in width and 50% in volume fraction as well as its long axis is parallel to compression direction, the compression strength of the alloy at 1250℃ is about 650 MPa. Key words： Nb-Si base alloy    vacuum induction melting    microstructure    tensile strength    high temperature compression strength 收稿日期: 2010-08-31      基金资助: 国家自然科学基金项目50671002和新世纪优秀人才计划项目NCET-06-0173资助 作者简介: 贾丽娜, 女, 1981年生, 博士生 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 贾丽娜 高明 盖京如 沙江波 郑立静 张虎 44.8K 链接本文: https://www.ams.org.cn/CN/10.3724/SP.J.1037.2010.00434      或      https://www.ams.org.cn/CN/Y2011/V47/I1/88 [1] Bewlay B P, Jackson M R, Lipsitt H A. Metall Mater Trans, 1996; 27A: 3802 [2] Guan P, Guo X P, Ding X, Zhang J, Gao L M. Acta Metall Sin, 2004; 17: 450 [3] Bewlay B P, Jackson M R, Subramanian P R. JOM, 1999; 51: 32 [4] Yao C F, Guo X P, Guo H S, Li Y K. J Mater Eng, 2007; 1: 165 (姚成方, 郭喜平, 郭海生, 李永凯. 材料工程, 2007; 1: 165) [5] Yang L L, Huang Y, Li X J, Zheng L J, Zhang H. Spec Cast Nonferrous Alloys, 2009; 26: 500 (杨莉莉, 黄 燕, 李小溅, 郑立静, 张虎. 特种铸造及有色合金, 2009; 26: 500) [6] Jia L N, Li X J, Sha J B, Zhang H. Rare Met Mater Eng, 2010; 39: 1476 (贾丽娜, 李小溅, 沙江波, 张虎. 稀有金属材料与工程, 2010; 39: 1476) [7] Yu J L, Zhang K F. Scr Mater, 2008; 59: 714 [8] Yu J L, Zhang K F, Wang G F. Intermetallics, 2008; 16: 1167 [9] Xu H B, Gao M, Gong L J, Tang X X, Zhang H. Chin Pat,200810101791.1, 2008 (徐惠彬, 高明, 龚路杰, 唐晓霞, 张虎. 中国专利, 200810101791.1, 2008) [10] Sekido N, Yoshisato K, Seiji M, Wei F G, Mishima Y. J Alloys Compd, 2006; 425: 223 [11] Ashby M F, Blunt F J, Bannister M. Acta Metall, 1989; 37: 1847 [12] Subramanian PR, MendirattaMG, DimidukDM, Stucke M A. Mater Sci Eng, 1997; A239: 8 [13] He Y D, Qu X H, Huang B Y. Chin J Rare Met, 2003; 27: 305 (何玉定, 曲选辉, 黄伯云. 稀有金属, 2003; 27: 305) No related articles found! Viewed Full text Abstract Cited   Shared      Discussed