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CORROSION FATIGUE BEHAVIOR OF 304 STAINLESS STEEL MICRO-SIZED SPECIMENS |
华中科技大学化学系 |
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Abstract Fatigue tests were performed using a special developed testing machine for 304 stainless steel micro-sized specimens in both the laboratory air and the aggressive (0.9% NaCl solution) environments. The experimental results showed that corrosion behavior on the surface of micro-sized specimens was mainly general corrosion and no obvious corrosion pits were found after pre-corrosion. Corrosion fatigue life of micro-sized specimen in air is about 107 cycles, which is about 10~100 times larger than that of the micro-sized specimen in corrosive solution. The decreasing value of maximum load was monitored during the course of corrosion fatigue tests and rapid decreasing value was observed at the terminal stage of corrosion fatigue tests. A detailed fractographical analysis was presented and no long corrosion fatigue crack was found on the fracture surface.
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Received: 24 August 2006
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