Influence of hot corrosion on low cycle fatigue behavior of nickel base superalloy SU 263
作者： J.K. Sahu , R.K. Gupta , J. Swaminathan , N. Paulose , S.L. Mannan
DOI: 10.1016/J.IJFATIGUE.2013.02.006
关键词: Grain boundary 、 Cracking 、 Corrosion 、 Low-cycle fatigue 、 Substrate (electronics) 、 Scanning electron microscope 、 Superalloy 、 Metallurgy 、 Layer (electronics) 、 Materials science
摘要: Abstract The influence of hot corrosion on low cycle fatigue behavior is studied by conducting tests at 800 °C in air bare and salt-coated (90%Na 2 SO 4 + 10%NaCl) specimens. This was followed extensive scanning electron microscopic (SEM) examinations. Significant reduction life observed across all values Δ e t /2 for the specimens comparison with SEM examination reveals that fused salt mixture sporadically removes protective chromium oxide layer exposes substrate. Subsequent analysis severe grain boundary oxidation leads to cracking provides numerous sites crack nucleation growth.
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