Effects of Ce Addition on Grain Boundary Character Distribution, Corrosion Behavior and Impact Toughness of AISI 204Cu S
- PDF / 3,638,896 Bytes
- 12 Pages / 593.972 x 792 pts Page_size
- 17 Downloads / 226 Views
JMEPEG (2019) 28:3683–3694 https://doi.org/10.1007/s11665-019-04112-0
Effects of Ce Addition on Grain Boundary Character Distribution, Corrosion Behavior and Impact Toughness of AISI 204Cu Stainless Steel Guojun Cai and Yanru Huang (Submitted November 29, 2018; in revised form March 15, 2019; published online May 22, 2019) 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 of c-fiber textures comprising {111} Æ110æ and {111} Æ112æ components was available for P probability more 3n boundaries with increasing Ce contents, which was believed to have a contribution to the P n enhancement of corrosion resistance. Meanwhile, the austenite grain refinement and 3 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. Keywords
AISI 204Cu stainless steel, Ce, corrosion behavior, grain boundary character distribution, impact toughness
1. Introduction AISI 204Cu stainless steel is a low-nickel austenite stainless steel which uses Mn and N elements substituting part of Ni element and has great potential to be used to fabricate anticorrosion materials, such as the kitchen utensil, electronic component, transport equipment and building material (Ref 13). As a representative of light rare earth elements, Ce with a lively chemical nature is presented as minority constituent to improve corrosion resistance and mechanical properties of steels (Ref 4-7). Arenas et al. (Ref 8) studied that the corrosion behavior of hot-dip galvanized steel could be significantly improved due to the segregation of Ce and La elements along the grain boundaries. Jeon et al. (Ref 9) reviewed that addition of Ce was helpful in decreasing the amount of sigma phase precipitates, thereby retarding the decline in the intergranular corrosion resistance of base alloy. Torkamani et al. (Ref 10) had done deep studies on the influence of Ce on the impact toughness related to the ferrite grain size, grain boundary, inclusion and volume fraction of pearlite in ferritic-perritic steels. Presently, the grain boundary character distribution (GBCD) has received a great attention depending on the control of P coincidence site lattice (CSL) grain boundaries (3 29) that exercise a great influence on the grain-boundary-related Guojun Cai, School of Mechanical Engineering, Liaoning Shihua University, Fushun 113001, China; and Yanru Huang, College of Sciences, Liaoning Shihua University, Fushun 113001, China. Contact e-mail: [email protected].
Journal of Materials Engineering and Performance
Data Loading...
