Effect of Zr addition on the glass-forming ability and mechanical properties of Ni-Nb alloy

被引：0
|
作者：
Zhu Z.W. [1 ]
Zhang H.F. [1 ]
Sun W.S. [1 ]
Hu Z.Q. [1 ]
机构：
[1] Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
来源：
Journal of Materials Research | 2007年 / 22卷 / 2期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1557/jmr.2007.0055
中图分类号：
学科分类号：
摘要：
The effect of zirconium (Zr) addition on the glass-forming ability (GFA) and mechanical properties of the Ni61.5Nb38.5 alloy has been studied. The addition of Zr improves the GFA. When x = 5 for Ni61.5Nb38.5-xZrx (in at.%) alloys, the alloy exhibits the best GFA and can be cast into 3-mm-diameter amorphous samples by using the copper mold injection-casting method. Differential scanning calorimetry measurements indicated that the thermal parameters, such as Trg and γ, have not a good correlation with the GFA in the Ni-Nb-Zr alloys. Compression tests reveal that the addition of Zr just decreases the fracture strength slightly from 3.4 to 3 GPa and that all of the tested samples exhibit a little compressive plasticity of about 2%. When x = 9, the feature of the fracture surface indicates that the alloy has a tendency for transition from the ductile to the brittle. And delicate "dimple" and microscale vein pattern structures have been observed on it. © 2007 Materials Research Society.
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页码：453 / 459
页数：6
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