Effect of extrusion process on microstructure and mechanical properties of Ni3Al-B-Cr alloy during self-propagation high-temperature synthesis

被引：21
|
作者：
Sheng Li-yuan [1 ,2 ]
Xi Ting-fei [1 ]
Lai Chen [1 ]
Guo Jian-ting [3 ]
Zheng Yu-feng [2 ]
机构：
[1] PKU HKUST Shenzhen Hong Kong Inst, Shenzhen 518057, Peoples R China
[2] Peking Univ, Coll Engn, Beijing 100871, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 03期
关键词：
Ni3Al intermetallic compound; self-propagation high-temperature synthesis; extrusion; microstructure; mechanical properties; COMBUSTION SYNTHESIS; GRAIN-SIZE; INTERMETALLICS; ALUMINIDES; BOUNDARIES; DUCTILITY; NICKEL;
D O I：
10.1016/S1003-6326(11)61203-X
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The well-densified Ni3Al-0.5B-5Cr alloy was fabricated by self-propagation high-temperature synthesis and extrusion technique. Microstructure examination shows that the synthesized alloy has fine microstructure and contains Ni3Al, Al2O3, Ni3B and Cr3Ni2 phases. Moreover, the self-propagation high-temperature synthesis and extrusion lead to great deformation and recrystallization in the alloy, which helps to refine the microstructure and weaken the misorientation. In addition, the subsequent extrusion procedure redistributes the Al2O3 particles and eliminates the gamma-Ni phase. Compared with the alloy synthesized without extrusion, the Ni3Al-0.5B-5Cr alloy fabricated by self-propagation high-temperature synthesis and extrusion has better room temperature mechanical properties, which should be ascribed to the microstructure evolution.
引用
收藏
页码：489 / 495
页数：7
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