In order to clarify the loading-frequency effect on the fatigue crack growth behavior of a low carbon steel JIS S10C in hydrogen gas environment, fully reversed bending fatigue tests were carried out. The main obtained results are as follows. Loading-frequency effect on FCG reveals complex behavior; that is, not only acceleration but also deceleration even in the same range of low loadingfrequency. Slight acceleration appears in the low growth rate range where the ductile fracture mode is predominant. Deceleration appears due to the transition behavior from quasi-cleavage fracture mode with a higher growth rate to ductile one with a lower growth rate. This shows that lowering the load-frequency does not necessarily lead dangerous fatigue crack growth.
|Number of pages||9|
|Journal||Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A|
|Publication status||Published - Nov 2009|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering