The Influence of Production Technology on the Structure and Mechanical Properties of Niobium-Silicon-Aluminum Alloys

被引：0
|
作者：
Sapegina, I. V. [1 ]
Lubnin, A. N. [1 ]
Ladyanov, V. I. [1 ]
机构：
[1] Russian Acad Sci, Udmurt Fed Res Ctr, Ural Branch, Izhevsk 426067, Russia
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2023年 / 124卷 / 03期
关键词：
niobium silicides; SHS; hardness; fracture toughness; NB-SI-AL; MICROSTRUCTURE; BEHAVIOR; INTERMETALLICS;
D O I：
10.1134/S0031918X22602050
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Cast Nb-14 at % Si-9 at % Al alloys fabricated by self-propagating high-temperature synthesis (SHS) and by SHS followed by electric arc remelting have been investigated. A structure consisting of a solid solution of silicon and aluminum in niobium (Nb-SS), a Nb3Al intermetallic compound, and a & beta;-Nb-5(Si,Al)(3) silicide formed in the alloy fabricated by SHS. Electric arc remelting suppressed the formation of the Nb3Al phase and resulted in the formation of a dispersed two-phase Nb-SS and & beta;-Nb-5(Si, Al)(3) structure in the alloy. The increased volume fraction of Nb-SS and the dispersed structure formed after electric arc remelting in the alloy increase its fracture toughness to 14.8 & PLUSMN; 0.8 MPa m(1/2) compared to 7.7 & PLUSMN; 0.8 MPa m(1/2) for the SHS-prepared alloy.
引用
收藏
页码：303 / 307
页数：5
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