Effects of nickel on low-temperature impact toughness and corrosion resistanceof high-ductility ductile iron

QC 20220126
High-ductility ductile iron was alloyed with 0–1.8 wt% Ni in this paper. The low-temperature impact toughness test and corrosion test of simulated seawater static whole-soaking were conducted to research the effect of nickel on the low-temperature impact toughness and corrosion resistance of high-ductility ductile iron. The results show that with nickel increasing, the impact toughness under low temperature ascents a great deal, and reaches the highest point with 0.71 wt% nickel addition, then descents; while the corrosion resistance has always been growing with the increasing of nickel content. Ductile iron containing 0.71 wt% nickel shows the best low-temperature impact toughness (the impact toughness values Akv of the samples reached 16.6 J at 20 C, 12.8 J at 40 C respectively) and exhibits the optimum combination properties. The presence of rust layer, which was made up of Fe3O4, played certain barrier for electrochemical reaction.

Hu, Sumeng (author)
Xiao, Zhiyun (author)
You, Sansan (author)
Zhao, Jingyu (author)
Yezhe, LyuSchool of Materials Science and Engineering, Zhengzhou University, 97 Wenhua Road, Zhengzhou 450002, China,System and Component Design(Swepub:kth)u136e6l9 (author)
School of Materials Science and Engineering, Zhengzhou University, 97 Wenhua Road, Zhengzhou 450002, ChinaSystem and Component Design (creator_code:org_t)

By the author/editor: Sun, Yufu; Hu, Sumeng; Xiao, Zhiyun; You, Sansan; Zhao, Jingyu; Yezhe, Lyu

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