Abstract
The cavitation erosion resistances of two martensitic, two austenitic and three ferritic stainless steels were evaluated. An austenitic manganese steel was also investigated for comparison with the austenitic stainless steels. The martensitic steels have the highest erosion resistances followed by the austenitic stainless and manganese steels while the ferritic stainless steels have very poor cavitation erosion resistances. The mechanisms of resistance and modes of erosion were investigated by means of optical microscopy, scanning and transmission electron microscopy and X-ray diffractometry. This study has highlighted the importance of microstructure in controlling the cavitation erosion resistance of alloys.
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