Understanding the high-temperature oxidation resistance of heat-resistant austenitic stainless steel with gradient nanostructure

被引：17
作者：
Wei, L. L. [1 ,2 ,3 ]
Wang, Y. G. [2 ]
Misra, R. D. K. [4 ]
Chen, J. [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China
[3] Ctr Excellence Adv Mat, Dongguan 523808, Peoples R China
[4] Univ Texas El Paso, Dept Met Mat & Biomed Engn, Lab Excellence Adv Steel Res, El Paso, TX 79968 USA
来源：
CORROSION SCIENCE | 2024年 / 231卷
基金：
中国国家自然科学基金;
关键词：
SMRT; Gradient nanostructured; Heat -resistant stainless steel; Oxidation resistance; Precipitates; Diffusivity; BREAKAWAY OXIDATION; EXHAUST-GAS; DEGREES-C; BEHAVIOR; ALLOYS; GROWTH; SCALE; WATER;
D O I：
10.1016/j.corsci.2024.111966
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The underlying high-temperature oxidation mechanisms of the heat-resistant austenitic stainless steel with gradient nanostructured surface layer is revealed through systematic analysis of the microstructure and composition. Nanoscale oxide grains and high-density grain boundaries promoted the formation of pronounced spinel oxides, which suppressed elemental diffusion and CrO3 volatilization. High level of residual stress in the GNS layer facilitated the formation of high-density precipitates at the oxide/matrix interface and grain boundaries, which hindered the growth of oxide scale and reactive elements diffusion. The enhanced high-temperature oxidation resistance resulted from the synergistic combination of spinel oxides, precipitates, and high-density grain boundaries.
引用
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页数：18
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