Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1555803 | Journal of Materials Science & Technology | 2015 | 7 Pages |
Abstract
The crack initiation mechanism of a Z3CN20.09M duplex stainless steel (DSS) during corrosion fatigue (CF) in water and air at 290â°C was investigated by using a CF cracking machine and a scanning electron microscopy (SEM). The cracks were initiated successively at the persistent slip bands (PSBs), phase boundaries (PBs) and pitting corrosion points (PCPs) of the specimens when they were tested in water at 290â°C, while in air at 290â°C the cracks were only initiated at the PSBs and PBs. And the cracks were found mainly to initiate at the PSBs and PBs when the specimens were tested in water and air at 290â°C, respectively. The results also reveal that the cracks were likely to be initiated at the first 20% of fatigue life of the specimens tested in water at 290â°C. However, the cracks were not found until 50% of fatigue life when tested in air at 290â°C. Moreover, the crack numbers of the specimens tested in water at 290â°C were much more than those tested in air at 290â°C.
Related Topics
Physical Sciences and Engineering
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Materials Chemistry
Authors
H.C. Wu, B. Yang, Y.Z. Shi, Q. Gao, Y.Q. Wang,