Unveiling the initial oxidation mechanism of a single crystal Ni-based superalloy with pre-deformation

被引：6

作者：

Ren, Jing ^{[1
]}

Hu, Ye-Bing ^{[2
]}

Cao, Tie-Shan ^{[1
]}

Cheng, Cong-Qian ^{[1
]}

Zhang, Li ^{[3
]}

Zhao, Jie ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, 2 Linggong Rd, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Sch Mech Engn, 2 Linggong Rd, Dalian 116024, Peoples R China

[3] Beijing Key Lab Aeronaut Mat Testing & Evalut, Beijing 100095, Peoples R China

来源：

CORROSION SCIENCE | 2024年 / 234卷

关键词：

Initial; Oxidation; Mechanism; Dislocation; Diffusion; Resistance; LOW-CYCLE FATIGUE; DEGREES-C; SURFACE DEFORMATION; BEHAVIOR; 1000-DEGREES-C; STRESS; ALLOYS; GROWTH; AIR; TEM;

D O I：

10.1016/j.corsci.2024.112146

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of pre-deformation on the initial oxidation mechanism of a single crystal Ni- was revealed. With predeformation, the recrystallized grain boundaries and dislocations provided sites for the nucleation of Al 2 O 3 and enhanced the diffusion flux of Al irrespective of gamma/gamma ' interface, gamma ' , and gamma phase. Ultimately, a thin compact alpha-Al 2 O 3 layer formed, improving the oxidation resistance. Without pre-deformation, Ni and Al atoms diffused along the gamma'/gamma interface, however, the Al -flux is insufficient to maintain the growth of Al 2 O 3 . As a result, a loose multilayer film formed on the surface, which decreased the oxidation resistance.

引用

页数：9

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