Creep rupture of a Ni-Fe based model alloy under simulated fireside corrosion in coal-fired boilers

被引：3
|
作者：
Yang, Xiaofeng [1 ]
Xu, Yaxin [1 ]
Lu, Jintao [2 ,3 ]
Huang, Jinyang [2 ]
Dang, Yingying [2 ]
Li, Wenya [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Shaanxi, Peoples R China
[2] Xian Thermal Power Res Inst Co Ltd, Natl Engn Res Ctr Integrat & Maintenance Clean & L, Xian 710032, Shaanxi, Peoples R China
[3] Xian Thermal Power Res Inst Co Ltd, Natl Engn Res Ctr Integrat & Maintenance Clean & L, Xingqing Rd 136, Xian 710032, Shaanxi, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 224卷
基金：
中国国家自然科学基金;
关键词：
Ni -Fe based superalloy; Creep rupture; Fireside corrosion; Sulfidation; POWER-PLANT APPLICATIONS; CR-BASED SUPERALLOY; HOT-CORROSION; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; BEHAVIOR; OXIDATION; DEFORMATION; STEEL; TEMPERATURE;
D O I：
10.1016/j.corsci.2023.111536
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of fireside corrosion on creep rupture of a Ni-Fe based model alloy was investigated by comparing the rupture life, fractography and microstructure of specimens in fireside corrosion and air. Results showed that the rupture life at 140 MPa in fireside corrosion is only 40% of that in air. The internal sulfidation along grain boundaries promoted the initiation of intergranular cracks, and was responsible for the premature rupture. The surface collapse in fireside corrosion was attributed to the outward propagation of internal cracks, while surface cracks in air originated from the formation of recrystallized grains in the surface layer.
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收藏
页数：13
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