Oxidation Behavior of Alx(CoCrFeNi)100-x High-Entropy Alloys Under Thermal-Cycling Conditions

被引：15

作者：

Dabrowa, J. ^{[1
]}

Cieslak, G. ^{[2
]}

Stygar, M. ^{[1
]}

Zajusz, M. ^{[1
]}

Jawanska, M. ^{[1
]}

Gil, A. ^{[1
]}

Jedlinski, J. ^{[1
]}

Mroczka, K. ^{[3
]}

Matsuda, K. ^{[4
]}

Kulik, T. ^{[2
]}

Danielewski, M. ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al Mickiewicza 30, PL-30059 Krakow, Poland

[2] Warsaw Univ Technol, Fac Mat Sci & Engn, Ul Woloska 141, PL-02507 Warsaw, Poland

[3] Pedag Univ Cracow, Inst Technol, Ul Podchorazych 2, PL-30084 Krakow, Poland

[4] Univ Toyama, Dept Mat Sci & Engn, Toyama, Japan

来源：

OXIDATION OF METALS | 2021年 / 96卷 / 3-4期

关键词：

High-entropy alloys; Superalloys; Thermal-cycling; Chromia formers; Alumina formers; CR-AL ALLOYS;

D O I：

10.1007/s11085-021-10048-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The oxidation behavior of five different high-entropy alloys from the Al-Co-Cr-Fe-Ni metallic system, namely Al-x(CoCrFeNi)(100-x) (x = 0; 3; 6; 9; 12), was studied under thermal-cycling conditions, at 1273 K in air atmosphere. The choice of selected compositions allowed for covering the chromia-to-alumina former transition, as well as the transition from the FCC single-phase solid solution structure to multiphase alloys with Al-enriched B2-structured constituent. The measurements were taken for 500 cycles (1 cycle - 1 h of heating, 20 min of cooling). The results indicate a profound influence of the thermal-cycling conditions on the oxidation products, with extremely complex scale structures and extensive internal oxidation and nitridation zones, as well as severe spallation of the oxide scale in most cases, showing the limited usefulness of these alloys for high-temperature applications at the current stage of their development.

引用

页码：307 / 321

页数：15

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