Fatigue Behaviour Of Nitrided Low Alloy Steel In 3%NaCl Solution
Author(s)
K. Tokaji & S. Takahashi
Abstract
Fatigue behaviour of nitrided low alloy steel in
3%NaCl solution
K. Tokajil & S. Takahashi2
Department of Mechanical and Systems Engineering,
Gifu University, GGifu, Japan
Engineering Department, Toeikanki Co. Ltd., Gifu, Japan
Abstract
Ths paper describes the corrosion fatigue behaviour of nitrided low alloy steel
(Cr-Mo steel). Rotary bending fatigue tests have been performed in 3%NaC1
solution using specimens with different nitride case depths. The corrosion fatigue
strengths of the nitrided materials increased compared with the untreated material
and with increasing the thickness of the compound layer. All the materials
showed lower fatigue strength in 3%NaC1 solution than in laboratory air.
Corrosion pits were seen underneath the compound layer, from which the crack
was initiated. Based on additional fatigue test results, the compound layer was
found to play a significant role in improving corrosion fatigue strength. Because
of the porous nature of the compound layer, the solution penetra
Keywords
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