Oxidation behaviour of Nb-rich Ni-Cr-Fe alloys: Role and effect of carbides precipitates

被引：32
作者：
Xu, Y. X. [1 ]
Lu, J. T. [2 ]
Li, W. Y. [1 ]
Yang, X. W. [1 ]
机构：
[1] Northwestern Polytech Univ, Shaanxi Key Lab Frict Welding Technol, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Xian Thermal Power Res Inst Co Ltd, Natl Energy R&D Ctr Clean & High Efficiency Fossi, Xian 710032, Shaanxi, Peoples R China
来源：
CORROSION SCIENCE | 2018年 / 140卷
基金：
美国国家科学基金会;
关键词：
Superalloys; SEM; EPMA; XRD; High-temperature corrosion; Oxidation; HIGH-TEMPERATURE OXIDATION; NICKEL-BASED SUPERALLOY; MECHANICAL-PROPERTIES; TIAL ALLOYS; SCALE FORMATION; 602; CA; MICROSTRUCTURE; ELEMENTS; DESIGN; AIR;
D O I：
10.1016/j.corsci.2018.05.040
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Present work aims to find the influence of carbide precipitates on the oxidation behaviour of Nb-rich Ni-Cr-Fe alloys at 1000 degrees C in air. Three Ni-Cr-Fe alloys, NC-15Fe-1Nb, NC-15Fe-1Nb-0.8C, NC-15Fe-1Nb-0.8C-0.5Ti were designed by alloying with Ti, Nb and C. Results show that the formation of NbC is crucial for the preferential oxidation of Cr. Moreover, either preventing NbC formation or favouring (Ti,Nb)C formation is found detrimental on such a beneficial effect, where the latter has a more intense influence. Roles of the precipitates in oxidation mechanism give new insights into the alloy optimization.
引用
收藏
页码：252 / 259
页数：8
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