High-temperature oxidation behaviors and mechanisms in newly designed L12-strengthened high-entropy alloys

被引：23
|
作者：
Hou, Jinxiong [1 ,2 ]
Tan, Yi [1 ]
Liu, Shaofei [3 ]
Zhang, Jianyang [1 ]
Xiao, Weicheng [1 ,3 ]
Kong, Haojie [3 ]
Li, Qian [1 ,2 ]
Cao, Boxuan [1 ,2 ]
Luan, Junhua [1 ]
Zhao, Yilu [4 ]
Kai, Jijung [3 ]
Yang, Tao [1 ,2 ]
机构：
[1] City Univ Hong Kong, Dept Mat Sci & Engn, Mech Behav Div, Shenyang Natl Lab Mat Sci, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Hong Kong Inst Adv Study, Kowloon Tong, Tat Chee Ave, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Dept Mech Engn, Hong Kong, Peoples R China
[4] Harbin Inst Technol, Sch Mat Sci & Engn, Shenzhen, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 208卷
基金：
中国国家自然科学基金;
关键词：
High -entropy alloys; Coherent precipitation strengthening; Multi-component intermetallic; Mechanical properties; Oxidation resistance; PRECIPITATION; EMBRITTLEMENT; SUPERALLOY; FRACTURE;
D O I：
10.1016/j.corsci.2022.110665
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behaviors of a newly-designed L1(2)-strengthened multi-component Ni-Co-Fe-Cr-Al-Ti-Nb system were studied at 800 ?degrees C, where the synergistic alloying effects of Ti, Nb, and Cr on the oxidation resistance were uncovered. The findings show that the doping of Ti facilitates the outward diffusion of metal cations and inward diffusion of oxygen ions through the Cr2O3 and Al2O3 scales, deteriorating the oxidation resistance. By substituting the Ti with Nb, a continuous and dense Al2O3 scale was potentially promoted benefiting from the "unlocked " Al atoms from the L1(2) particles. The increased additions of Cr and Nb contribute to the improved oxidation resistance.
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页数：11
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