A computerized digital SPI system was set up to determine the in-plane distribution of displacement and strain at crack tip of corrosion fatigue(CF) specimens. The principle and the experimental method of this technique were described here in detail. The results show that (1) the classic finite element models are not suitable to describe the near-tip deformation in our case; (2) the SPI system is proved to be applicable in investigating the crack tip deformation behaviors in corrosive solution, and is a powerful method in SCC and CF study; (3)for steel A537, hydrogen-charging can increase the hardness of material ahead of the crack tip, and it leads to the decrease of both the plastic area and the maximum strain level; (4) the anodic dissolution can enhance the crack-tip deformation of pure copper specimen immersed in corrosive solution.
|Original language||English (US)|
|Number of pages||6|
|Journal||Acta Metallurgica Sinica Series B, Process Metallurgy & Miscellaneous|
|State||Published - Dec 1 1993|
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