Effect of Aluminium and Molybdenum on the microstructural evolution and mechanical properties of hypoeutectic Nb-Si-Cr Alloys

被引：13
作者：
Kansabanik, T. [1 ,3 ]
Biswas, Krishanu [1 ]
Tewari, R. [2 ]
机构：
[1] IIT Kanpur, Dept Mat Sci & Engn, Kanpur 208016, Uttar Pradesh, India
[2] Bhabha Atom Res Ctr, Mat Sci Div, Bombay 400085, Maharashtra, India
[3] Micro Small & Medium Enterprise GOI, Bombay, Maharashtra, India
来源：
MATERIALS TODAY-PROCEEDINGS | 2016年 / 3卷 / 09期
关键词：
Nb-Si-Cr-Al; Nb-Si-Cr-Al-Mo; Hypoeutectic; Solidification Pathway; Compression test; Oxidation resistance; HIGH-TEMPERATURE; STRUCTURAL APPLICATIONS; COMPOSITES; SOLIDIFICATION; MO;
D O I：
10.1016/j.matpr.2016.09.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Among the refractory metals, Nb-based alloys are considered the most promising potential materials in the field of high temperature applications (>= 1150 degrees C). In this regard, novel alloy design strategies are needed to be adopted to obtain a balance between strength and creep resistance at elevated temperature and ductility and fracture toughness at low temperature. The present investigation is aimed at developing the Nb-rich hypoeutectic quaternary (Nb-Si-Cr-Al) and quinary (Nb-Si-Cr-Al-Mo) alloys and study microstructural evolution and mechanical properties and thereby studying the effect of addition of Al and Mo. The composition of the quaternary (Nb-Si-Cr-Al) and quinary (Nb-Si-Cr-Al-Mo) alloys are chosen using intelligent guess and the binary and ternary phase diagrams among the elements. The mechanical properties of alloys were analyzed and correlated with the microstructure. Precipitates of hard and brittle silicide ( aNb5Si3) as well as Laves (Cr2Nb) phase contribute the strength whereas (Nb) ss imparts ductility to the alloy.
引用
收藏
页码：2981 / 2990
页数：10
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