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Acta Metall Sin  2013, Vol. 49 Issue (11): 1347-1355    DOI: 10.3724/SP.J.1037.2013.00472
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CHARACTERISTICS OF A NiAl EUTECTIC ALLOY JJ—3 WITH EXCELLENT PROPERTIES
YUAN Chao, ZHOU Lanzhang, LI Gusong, GUO Jianting
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
Cite this article: 

YUAN Chao, ZHOU Lanzhang, LI Gusong, GUO Jianting. CHARACTERISTICS OF A NiAl EUTECTIC ALLOY JJ—3 WITH EXCELLENT PROPERTIES. Acta Metall Sin, 2013, 49(11): 1347-1355.

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Abstract  

A new NiAl eutectic alloy JJ—3 with excellent comprehensive properties had been successfully developed in China for the potential vanes materials. In this paper, the study results on alloy JJ—3, including the composition, microstructure characteristics, physical, mechanical and chemical properties, and process technologies have been introduced briefly. On the basis of maintaining the low density, the higher melting point and thermal conductivity, the excellent oxidation resistance being peculiar to NiAl alloy, alloy JJ—3 have good high temperature stress—rupture strength, which are almost as the same as those of the advanced directionally solidified superalloys. Meanwhile, alloy JJ—3 possess good weldability and castability, and had already been cast the vanes with the complicated shape. With the excellent comprehensive properties, alloy JJ—3 is very close to practical engineering application, only if the poor ductility at room temperature must be improved in the future.

Key words:  NiAl alloy      eutectic microstructure      comprehensive property     
Received:  07 August 2013     

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2013.00472     OR     https://www.ams.org.cn/EN/Y2013/V49/I11/1347

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