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Abstract
In this study, the effects of Ce addition on grain boundary character distribution, corrosion behavior and impact toughness of AISI 204Cu stainless steel were investigated. The results revealed that rare earth Ce affected the characteristics and size of inclusions, and the change in the austenite grain size was attributable to Ce multi-phase inclusions as the core of heterogeneous nucleation in stainless steel. The high adjacent probability of γ-fiber textures comprising {111} 〈110〉 and {111} 〈112〉 components was available for more ∑3n boundaries with increasing Ce contents, which was believed to have a contribution to the enhancement of corrosion resistance. Meanwhile, the austenite grain refinement and ∑3n boundaries increment were beneficial for the impact toughness improvement of Ce-added steel by increasing the difficulty of crack initiation and propagation. Adding excessive Ce caused a decline in the corrosion behavior and impact toughness of 204Cu stainless steel.
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