CHARACTERISTICS OF A NiAl EUTECTIC ALLOY JJ&mdash;3 WITH EXCELLENT PROPERTIES

YUAN Chao; ZHOU Lanzhang; LI Gusong; GUO Jianting

doi:10.3724/SP.J.1037.2013.00472

Acta Metall Sin >

2013 , Vol. 49 >Issue 11: 1347 - 1355

DOI: https://doi.org/10.3724/SP.J.1037.2013.00472

CHARACTERISTICS OF A NiAl EUTECTIC ALLOY JJ—3 WITH EXCELLENT PROPERTIES

YUAN Chao ,
ZHOU Lanzhang ,
LI Gusong ,
GUO Jianting

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Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016

Received date: 2013-08-07

Revised date: 2013-09-09

Online published: 2013-11-11

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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

Cite this article

YUAN Chao , ZHOU Lanzhang , LI Gusong , GUO Jianting . CHARACTERISTICS OF A NiAl EUTECTIC ALLOY JJ—3 WITH EXCELLENT PROPERTIES[J]. Acta Metall Sin, 2013 , 49(11) : 1347 -1355 . DOI: 10.3724/SP.J.1037.2013.00472

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